As filed with the U.S. Securities and Exchange Commission on October 1, 2020

Registration No. 333-222206

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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POST-EFFECTIVE AMENDMENT NO. 4 TO

(Amendment No. 2)

to

FORM S-1

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

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DUOS TECHNOLOGIES GROUP, INC.

(Exact name of registrant as specified in its charter)

6622 Southpoint Drive South, Suite 310

Jacksonville, Florida 32216

(904) 652-1616

(Address and telephone number of registrant’s principal executive offices and principal place of business)

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Communication Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box. þ

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act of 1933, please check the following box and list the Securities Act registration Statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act of 1933, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act of 1933, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ¨

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE SECURITIES ACT OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SUCH SECTION 8(a), MAY DETERMINE.

EXPLANATORY NOTE

On December 29, 2017, the U.S. Securities and Exchange Commission declared effective the registration statement number 333-222206 on Form S-1 (the “Registration Statement”) filed by Duos Technologies Group. Inc. (the “Company”).  The Company is filing this post-effective amendment No. 4 to the Registration Statement for the purpose of updating its financial and other disclosures.

The information in this preliminary prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the U.S. Securities and Exchange Commission (“SEC”) is effective. This preliminary prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

PROSPECTUS

Subject to completion, dated October 1, 2020

DUOS TECHNOLOGIES GROUP, INC.

3,532,895 Shares of Common Stock

243,572 Shares of Common Stock issuable upon Conversion of Series B Convertible Preferred Stock

1,589,107 Shares of Common Stock Issuable upon Exercise of Warrants

This prospectus relates to the offering and resale by the Selling Stockholders identified herein of up to 5,677,472 shares of Common Stock, of Duos Technologies Group, Inc. (the “Company”). These shares include 3,532,895 shares of Common Stock, 243,572 shares of Common Stock underlying the Company’s Series B Convertible Preferred Stock (the “Series B Preferred”), 1,589,107 shares of Common Stock issuable upon exercise of warrants issued and sold to investors (the “Warrants”) in a private placement offering (the “Private Placement Offering”).

The Selling Stockholders may from time to time sell, transfer or otherwise dispose of any or all of the securities in a number of different ways and at varying prices. See “Plan of Distribution” beginning on page 28 of this prospectus for more information.

We are not selling any shares of common stock in this offering, and we will not receive any proceeds from the sale of shares by the Selling Stockholders.

Our Common Stock is currently quoted on the Nasdaq Capital Market under the symbol “DUOT.” On August 31, 2020, the closing price as reported on the Nasdaq Capital Market was $4.18 per share. This price will fluctuate based on the demand for our common stock.

The Selling Stockholders may offer all or part of the shares for resale from time to time through public or private transactions, at either prevailing market prices or at privately negotiated prices.

This prospectus provides a general description of the securities being offered. You should this prospectus and the registration statement of which it forms a part before you invest in any securities.

Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 15 of this prospectus for a discussion of information that should be considered in connection with an investment in our securities.

Our auditors have issued a going concern opinion. For more information please see the going concern opinion on page F-2 and the risk factors herein.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is October 1, 2020

TABLE OF CONTENTS

You may only rely on the information contained in this prospectus or that we have referred you to. We have not authorized anyone to provide you with different information. This prospectus does not constitute an offer to sell or a solicitation of an offer to buy any securities other than the common stock offered by this prospectus. This prospectus does not constitute an offer to sell or a solicitation of an offer to buy any common stock in any circumstances in which such offer or solicitation is unlawful. Neither the delivery of this prospectus nor any sale made in connection with this prospectus shall, under any circumstances, create any implication that there has been no change in our affairs since the date of this prospectus is correct as of any time after its date.

PROSPECTUS SUMMARY

This summary highlights selected information appearing elsewhere in this prospectus. While this summary highlights what we consider to be important information about us, you should carefully read this entire prospectus before investing in our common stock and warrants, especially the risks and other information we discuss under the headings “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operation” and our consolidated financial statements and related notes beginning on page F-1. Our fiscal year end is December 31 and our fiscal years ended December 31, 2018 and 2019 are sometimes referred to herein as fiscal years 2018 and 2019, respectively. Some of the statements made in this prospectus discuss future events and developments, including our future strategy and our ability to generate revenue, income and cash flow. These forward-looking statements involve risks and uncertainties which could cause actual results to differ materially from those contemplated in these forward-looking statements. See “Cautionary Note Regarding Forward-Looking Statements”. Unless otherwise indicated or the context requires otherwise, the words “we,” “us,” “our”, the “Company” or “our Company” or “Duos” refer to Duos Technologies Group, Inc., a Florida corporation, and our wholly owned subsidiaries, Duos Technologies, Inc. and TrueVue 360, Inc.

Except as otherwise indicated in this prospectus, all common stock and per share information and all exercise prices with respect to our warrants reflect, on a retroactive basis, a 1-for-14 reverse stock split of our common stock, which became effective on the OTCQX on January 17,2020. This prospectus assumes the over-allotment option of the underwriters has not been exercised, unless otherwise indicated.

Our Corporate History

We were incorporated on May 31, 1994 in the State of Florida as Information Systems Associates, Inc. Initially, our business operations consisted of consulting services for asset management of large corporate data centers and development and licensing of Information Technology (IT) asset management software. On April 1, 2015, we completed a reverse triangular merger, pursuant to an Agreement and Plan of Merger (the “Merger Agreement”) among Duos Technologies, Inc., a Florida corporation (“DTI”), the Company, and Duos Acquisition Corporation, a Florida corporation and wholly owned subsidiary of the Company (“Merger Sub”). Under the terms of the Merger Agreement, the Merger Sub merged with and into DTI, whereby DTI remained as the surviving corporation and a wholly owned subsidiary of the Company (the “Merger”). On the same date, TrueVue 360, Inc., a Delaware corporation, became a wholly owned subsidiary of the Company. In connection with the Merger, on July 10, 2015, the Company effected a name change to Duos Technologies Group, Inc. Since January 2019, Truevue360, Inc. has been focused on the development and marketing of Artificial Intelligence applications. The Company’s headquarters are located at 6622 Southpoint Drive South, Suite 310, Jacksonville Florida 32216 and main telephone number is 904 652 1616.

Overview

The Company, through its wholly owned subsidiaries DTI, operating under its brand name duostech™, and truevue360™, focuses on the design, development and turnkey delivery of proprietary “intelligent technologies” that enable our customers to derive measurable increases in return on investment for their business.

duostech™

The mission of duostech™ is to develop, market and deploy disruptive technologies and systems that capture, process and present users with an unlimited number and types of data that provide our customers with a broad range of sophisticated intelligent technology solutions. With an emphasis on security, inspection and operations for critical infrastructure, we target a variety of industries including transportation, retail, law enforcement, oil, gas and utilities. Our technologies capture, process and present all data in real time. A further differentiator is that these technologies integrate with our customer’s existing business process and create actionable information to streamline mission critical operations. Our technologies have been verified by multiple government and private organizations including but not limited to, Johns Hopkins University Applied Physics Laboratory (JHU/APL), the Department of Homeland Security (DHS) and the Transportation Technology Center, Inc., a wholly owned subsidiary of the Association of American Railroads, a transportation research and testing organization (TTCI) and perhaps most significantly, they have been field tested and found relevant by our customers, which is the main reason for our substantial repeat business. The Company has worked with these organizations over the past several years where we have supplied funded prototypes of our technologies to verify technology and operating parameters.

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truevue360™

In January 2019, the Company launched a dedicated Artificial Intelligence program through its wholly-owned subsidiary True Vue 360, Inc., marketing its services and solutions under the brand name truevue360™. The Company is committed to adding significant focus on the development, marketing and deployment of advanced convolutional neural network-based Artificial Intelligence (“AI”), Deep Machine Learning and Advanced Algorithms applications. While truevue360™ will chiefly support DTI’s business growth, it will also develop and market its significant library of AI applications following a stand-alone business development strategy. Accordingly, our business is now operating in two equally important business units which complement each other and provide comprehensive turn-key, end-to-end, solutions to our customers.

Connected Intelligence

duostech™

Over the past 10 years, duostech™ has developed an extensive suite of disruptive technologies, some of the most relevant are described in the following:

Intelligent Railcar Inspection Portal (rip®)

Federal regulations require each railcar/train to be inspected for mechanical defects prior to leaving a rail yard. Founded in 1934, the Association of American Railroads (AAR) is responsible for setting the standards for the safety and productivity of the U.S./North American freight rail industry, and by extension, has established the inspection parameters for the rail industry’s rolling stock. Also known as the “Why Made” codes, the AAR established approximately 110 inspection points under its guidelines for mechanical inspections.

Under current practice, inspections are conducted manually; a very labor intensive and inefficient process that only covers a select number of inspections points and can take up to 3 hours per train. It should be noted that approximately 50% of the rail industry’s operating costs are for maintenance, including 30% of the time trains spend in workshops resulting from manual failure diagnostics.

We invented, designed, deployed, and are currently marketing our intelligent Railcar Inspection Portal technology, intended to ultimately cover most, if not all, inspection points and reduce the in-yard dwell time to minutes per train. Our system combines high definition image and data capture technologies (developed by duostech™) with our AI-based analytics applications (developed and maintained by truevue360™) that are typically installed on active tracks located between two rail yards. We inspect railcars traveling through our inspection portal at speeds of up to 70 mph and report mechanical anomalies detected by our system to the ensuing yard, well ahead of the train(s) entering the yard. To date, we have successfully completed the development of 21 AI applications and are in the process of developing 44 additional applications scheduled to be completed by the end of Q2, 2020.

Over the past two years, several class 1 rail operators have ordered and are currently operating our rip® technology with the ultimate objective to cause a change in federal rules that would allow replacement of the current manual inspection (in the yard) with a fully automated process. The Company is collaborating with certain industry professionals to pursue such regulatory rule changes and we believe that there will be broad acceptance of our technology as soon as a majority of required AI algorithm models are completed and tested.

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Our rip® system consists of a suite of sub-systems for the automated inspection of freight or transit railcars at high speeds. The combined technologies capture images and other relevant operating data from 360-degrees of each locomotive and railcar passing through our inspection portal. All data is processed and presented in real-time by our proprietary intelligent user interface, branded as centraco®.

Mechanical anomalies are detected through a combination of remote visual inspections, utilizing the Company’s proprietary remote user interface which displays ultra-high definition images of a 360-degree view of each railcar, and by a growing number of the Company’s proprietary artificial intelligence (AI) based algorithms, discussed in more detail under truevue360™. The inspection portal is typically installed between two rail yards and the inspection takes place while the trains are traveling at speeds of up to 70 mph. Detections are reported to the respective rail yards well ahead of the train arrival at the yard.

An expanded version for speeds up to 120 mph with additional sensor technologies for the transit rail is currently under development in anticipation of market entry to the passenger railcar mechanical inspection in early 2020.

The following examples of automated detections are the result of the combination of our image capture technologies designed by duostech™, with our AI-based analytics applications designed and maintained by truevue360™. Some of these mechanical defects, if unattended, could cause a derailment. Other examples of our AI-based detection applications include inspections at rail border crossings by CBP agents.

Samples of Automated Detections

The Company continues to expand its detection capabilities through the development of additional sensor technologies, necessary to process AI-based analytics of targets not yet covered by its core railcar inspection applications.

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The industry’s main objective is to replace the manual inspection process taking place inside rail yards with a fully automated process taking place before trains reach the respective rail yards. To that end, the Company, together with its rail partners, is pursuing to effect changes to current FAA rules, an effort that we expect to be successful and receive wide acceptance by the industry and regulators alike.

Our Growth Strategy

Our strategy is to grow our business through a combination of organic growth of both duostech™ and truevue360™, as well as through strategic acquisitions.

Organic Growth duostech™

Our organic growth strategy is to increase our market share through the expansion of our business development team and our research and development talent pool, which will enable us to significantly expand our current solution offerings with additional features, and the development of new and enhanced technology applications. We plan to augment such growth with strategic relationships both in the business development and research development arenas, reducing time to market with additional industry applications, expansion of existing offerings to meet customer requirements, as well as, potential geographical expansion into international territories. The launch of our AI software systems through our truevue360™ subsidiary is another building block of this strategy.

Organic Growth truevue360™

truevue360™’s immediate growth will mainly be driven by its already established library of rail applications and existing rail customers. Each of the most recent orders of rail inspection portals included an AI component of between 20 and 30 algorithms per customer per site, with a significant number of additional applications under development. It is expected that future orders will continue to include a significant component of algorithms i.e. AI applications.

Our AI applications are sold as a SaaS model and are priced per application/per site.

In addition to offering our AI modelling to our rail customers, we plan to offer services to our commercial /industrial customers in the following verticals:

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Logistics companies

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Oil & Gas

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Commercial security

truevue360™ is currently developing a stand-alone marketing/business development initiative to pursue an expanded number of target markets. Additional verticals to be pursued as this unit expands include:

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Automotive

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Agriculture

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Banking

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Industrial

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DOD/Government

Strategic Acquisitions

Planned acquisition targets include sector specific technology companies with the objective of augmenting our current capabilities with feature-rich (third-party) solutions. The acquisition metric includes, but is not limited to, weighing time, effort and approximate cost to develop certain technologies in-house, versus acquiring or merging with one or more entities that we believe have a proven record of successfully developing a technology sub-component. Additional criteria include an extended national footprint of available manpower (predominantly technical and software engineering), and evaluating the potential acquisition target’s customer base, stage of technology and merger or acquisition cost as compared to market conditions.

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Our Risks and Challenges

An investment in our securities involves a high degree of risk. You should carefully consider the risks summarized below. The risks are discussed more fully in the “Risk Factors” section of this prospectus immediately following this prospectus summary. These risks include, but are not limited to, the following:

Recent Developments

On February 12, 2020, we entered into an underwriting agreement (the “Underwriting Agreement”) with ThinkEquity, a division of Fordham Financial Management, Inc. (“ThinkEquity”), as representative of the underwriters listed therein (the “Underwriters”), pursuant to which the Company agreed to sell to the Underwriters in a firm commitment underwritten public offering (the “Offering”) an aggregate of 1,350,000 shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”), at a public offering price of $6.00 per share. In addition, the Underwriters were granted an over-allotment option (the “Over-allotment Option”) for a period of 45 days to purchase up to an additional 202,500 shares of Common Stock. The Offering closed on February 18, 2020. In connection with the Offering, the Common Stock began trading on the Nasdaq Capital Market under the symbol DUOT on February 13, 2020.

On February 12, 2020, pursuant to the Underwriting Agreement, the Company entered into an Underwriter’s warrant agreement (the “Underwriters’ Warrant Agreement”) with the Underwriters and certain affiliates of the Underwriters. Pursuant to the Underwriters’ Warrant Agreement, the Company provided the Underwriters and certain affiliates of the Underwriters with a warrant to purchase 67,500 shares of Common Stock in the aggregate. Such warrant may be exercised beginning on August 10, 2020 (the date that is 180 days after the date on which the Registration Statement became effective) until February 12, 2023 (the date that is three years after the date on which the Registration Statement became effective). The initial exercise price of the Underwriters’ Warrant Agreement is $9.00 per share.

On February 20, 2020, pursuant to and in compliance with the terms and conditions of the Underwriting Agreement and the Offering, the Underwriters provided notice that they would partially exercise the Over-allotment Option to purchase 192,188 shares of Common Stock at $6.00 per share (the “Over-Allotment Exercise”). The sale of the Over-Allotment Exercise to purchase 192,188 shares of Common Stock closed on February 21, 2020. The Company has received gross proceeds of approximately $9.25 million for the Offering, including the exercise of the Over-Allotment Exercise, prior to deducting underwriting discounts and commissions and offering expenses payable by the Company.

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THE OFFERING

This prospectus relates to the offer and sale from time to time of up to 5,660,000 shares of our common stock by the Selling Stockholders that may be issued upon conversion of the Series B Preferred Stock, up to 19,062,742 shares of our common stock by the Selling Stockholders that may be issued upon the conversion of warrants to purchase shares of our common stock, and 20,902,742 shares of our common stock.

In connection with the Private Offering, under the terms of the Registration Rights Agreement entered into with the Selling Stockholders on the same date and in connection with the Securities Purchase Agreement, we must register with the U.S. Securities and Exchange Commission 20,902,742 shares of common stock, 5,660,000 shares of common stock underlying the Series B Preferred Stock, and 19,062,742 shares of common stock underlying the Warrants. The number of shares ultimately offered for resale by the Selling Stockholders depends upon how much of the Series B Preferred Stock and Warrants the Selling Stockholders elect to convert and exercise, respectively, and the liquidity and market price of our common stock.

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Unless we indicate otherwise, all information in this prospectus:

Excludes 166,163 shares of common stock underlying the warrants to be issued to the placement agent in connection with this offering, 160,143 incentive stock options granted to employees, 103,110 outstanding warrants.

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SUMMARY OF CONSOLIDATED FINANCIAL INFORMATION

The following summary consolidated statements of operations data for the fiscal years ended December 31, 2019 and 2018 have been derived from our audited consolidated financial statements included elsewhere in this prospectus. The summary consolidated balance sheet data as of December 31, 2019 are derived from our consolidated financial statements that are included elsewhere in this prospectus. The historical financial data presented below is not necessarily indicative of our financial results in future periods, and the results for the quarter ended June 30, 2020 is not necessarily indicative of our operating results to be expected for the full fiscal year ending December 31, 2020 or any other period. You should read the summary consolidated financial data in conjunction with those financial statements and the accompanying notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” Our consolidated financial statements are prepared and presented in accordance with United States generally accepted accounting principles, or U.S. GAAP. Our consolidated financial statements have been prepared on a basis consistent with our audited financial statements and include all adjustments, consisting of normal and recurring adjustments that we consider necessary for a fair presentation of the financial position and results of operations as of and for such periods.

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DUOS TECHNOLOGIES GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

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DUOS TECHNOLOGIES GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Continued)

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DUOS TECHNOLOGIES GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (CONTINUED)

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DUOS TECHNOLOGIES GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

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DUOS TECHNOLOGIES GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

 (Continued)

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DUOS TECHNOLOGIES GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (CONTINUED)

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RISK FACTORS

Investing in our securities involves a great deal of risk. Careful consideration should be made of the following factors as well as other information included in this prospectus before deciding to purchase our securities. There are many risks that affect our business and results of operations, some of which are beyond our control. Our business, financial condition or operating results could be materially harmed by any of these risks. This could cause the trading price of our securities to decline, and you may lose all or part of your investment. Additional risks that we do not yet know of or that we currently think are immaterial may also affect our business and results of operations.

Risks Related to Our Company and Business

The nature of the technology management platforms utilized by us are complex and highly integrated, and if we fail to successfully manage releases or integrate new solutions, it could harm our revenues, operating income, and reputation.

The technology platforms developed and designed by us accommodate integrated applications that include our own developed technology and third-party technology, thereby substantially increasing their functionality.

Due to this complexity and the condensed development cycles under which we operate, we may experience errors in our software, corruption or loss of our data, or unexpected performance issues from time to time. For example, our solutions may face interoperability difficulties with software operating systems or programs being used by our customers, or new releases, upgrades, fixes or the integration of acquired technologies may have unanticipated consequences on the operation and performance of our other solutions. If we encounter integration challenges or discover errors in our solutions late in our development cycle, it may cause us to delay our launch dates. Any major integration or interoperability issues or launch delays could have a material adverse effect on our revenues, operating income and reputation.

We face risks related to Novel Coronavirus (COVID-19) which could significantly disrupt our research and development, operations, sales, and financial results.

Our business will be adversely impacted by the effects of the Novel Coronavirus (COVID-19). In addition to global macroeconomic effects, the Novel Coronavirus (COVID-19) outbreak and any other related adverse public health developments will cause disruption to our operations and sales activities. Our third-party manufacturers and our customers have been and will be disrupted by worker absenteeism, quarantines and restrictions on employees’ ability to work, office and factory closures, disruptions to ports and other shipping infrastructure, border closures, or other travel or health-related restrictions. Depending on the magnitude of such effects on our activities or the operations of our third-party manufacturers and third-party distributors, the supply of our products will be delayed, which could adversely affect our business, operations and customer relationships. In addition, the Novel Coronavirus (COVID-19) or other disease outbreak will in the short-run and may over the longer term adversely affect the economies and financial markets of many countries, resulting in an economic downturn that will affect demand for our products and services and impact our operating results. There can be no assurance that any decrease in sales resulting from the Novel Coronavirus (COVID-19) will be offset by increased sales in subsequent periods. Although the magnitude of the impact of the Novel Coronavirus (COVID-19) outbreak on our business and operations remains uncertain, the continued spread of the Novel Coronavirus (COVID-19) or the occurrence of other epidemics and the imposition of related public health measures and travel and business restrictions will adversely impact our business, financial condition, operating results and cash flows. In addition, we have experienced and will experience disruptions to our business operations resulting from quarantines, self-isolations, or other movement and restrictions on the ability of our employees to perform their jobs that may impact our ability to develop and design our products and services in a timely manner or meet required milestones or customer commitments.

Our products and services may fail to keep pace with rapidly changing technology and evolving industry standards.

The market in which we operate is characterized by rapid, and sometimes disruptive, technological developments, evolving industry standards, frequent new product introductions and enhancements and changes in customer requirements. In addition, both traditional and new competitors are investing heavily in our market areas and competing for customers. As next-generation video analytics technology continues to evolve, we must keep pace in order to maintain or expand our market position. We recently introduced a significant number of new product offerings and are increasingly focused on new, high value safety and security-based surveillance products, as a revenue driver. If we are not able to successfully add staff resources with sufficient technical skills to develop and bring these new products to market in a timely manner, achieve market acceptance of our products and services or identify new market opportunities for our products and services, our business and results of operations may be materially and adversely affected.

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The market opportunity for our products and services may not develop in the ways that we anticipate.

The demand for our products and services can change quickly and in ways that we may not anticipate because the market in which we operate is characterized by rapid, and sometimes disruptive, technological developments, evolving industry standards, frequent new product introductions and enhancements, changes in customer requirements and a limited ability to accurately forecast future customer orders. Our operating results may be adversely affected if the market opportunity for our products and services does not develop in the ways that we anticipate or if other technologies become more accepted or standard in our industry or disrupt our technology platforms.

Our revenues are dependent on general economic conditions and the willingness of enterprises to invest in technology.

We believe that enterprises continue to be cautious about sustained economic growth and have tried to maintain or improve profitability through cost control and constrained spending. While our core technologies are designed to address cost reduction, other factors may cause companies to delay or cancel capital projects, including the implementation of our products and services. In addition, certain industries in which we operate are under financial pressure to reduce capital investment which may make it more difficult for us to close large contracts in the immediate future. We believe there is a growing market trend toward more customers exploring operating expense models as opposed to capital expense models for procuring technology. We believe the market trend toward operating expense models will continue as customers seek ways of reducing their overhead and other costs. All of the foregoing may result in continued pressure on our ability to increase our revenue and may potentially create competitive pricing pressures and price erosion. If these or other conditions limit our ability to grow revenue or cause our revenue to decline our operating results may be materially and adversely affected.

Some of our competitors are larger and have greater financial and other resources than we do.

Some of our product offerings compete and will compete with other similar products from our competitors. These competitive products could be marketed by well-established, successful companies that possess greater financial, marketing, distributional, personnel and other resources than we possess. In certain instances, competitors with greater financial resources also may be able to enter a market in direct competition with us offering attractive marketing tools to encourage the sale of products that compete with our products or present cost features that our target end users may find attractive.

We have a history of losses and our growth plans may lead to additional losses and negative operating cash flows in the future.

Our accumulated deficit was approximately $33 million as of December 31, 2019. Our operating losses may continue as we continue to expend resources to further develop and enhance our technology offering, to complete prototyping for proof-of-concept, obtain regulatory clearances or approvals as required, expand our business development activities and finance capabilities and conduct further research and development. We also expect to experience negative cash flow in the short-term until our revenues and margins increase at a rate greater than our expenses, which may not occur.

We may be unable to protect our intellectual property, which could impair our competitive advantage, reduce our revenue, and increase our costs.

Our success and ability to compete depend in part on our ability to maintain the proprietary aspects of our technologies and products. We rely on a combination of trade secrets, patents, copyrights, trademarks, confidentiality agreements, and other contractual provisions to protect our intellectual property, but these measures may provide only limited protection. We customarily enter into written confidentiality and non-disclosure agreements with our employees, consultants, customers, manufacturers, and other recipients of information about our technologies and products and assignment of invention agreements with our employees and consultants. We may not always be able to enforce these agreements and may fail to enter into any such agreement in every instance when appropriate. We license from third-parties certain technology used in and for our products. These third-party licenses are granted with restrictions; therefore, such third-party technology may not remain available to us on terms beneficial to us. Our failure to enforce and protect our intellectual property rights or obtain from third parties the right to use necessary technology could have a material adverse effect on our business, operating results, and financial condition. In addition, the laws of some foreign countries do not protect proprietary rights as fully as do the laws of the United States.

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Patents may not issue from the patent applications that we have filed or may file in the future. Our issued patents may be challenged, invalidated, or circumvented, and claims of our patents may not be of sufficient scope or strength, or issued in the proper geographic regions, to provide meaningful protection or any commercial advantage. We have registered certain of our trademarks in the United States and other countries. We cannot assure you that we will obtain registrations of principal or other trademarks in key markets in the future. Failure to obtain registrations could compromise our ability to protect fully our trademarks and brands and could increase the risk of challenge from third parties to our use of our trademarks and brands.

We may be required to incur substantial expenses and divert management attention and resources in defending intellectual property litigation against us.

We cannot be certain that our technologies and products do not and will not infringe on issued patents or other proprietary rights of others. While we are not currently subject to any infringement claim, any future claim, with or without merit, could result in significant litigation costs and diversion of resources, including the attention of management, and could require us to enter into royalty and licensing agreements, any of which could have a material adverse effect on our business. We may not be able to obtain such licenses on commercially reasonable terms, if at all, or the terms of any offered licenses may be unacceptable to us. If forced to cease using such technology, we may be unable to develop or obtain alternate technology. Accordingly, an adverse determination in a judicial or administrative proceeding, or failure to obtain necessary licenses, could prevent us from manufacturing, using, or selling certain of our products, which could have a material adverse effect on our business, operating results, and financial condition.

Furthermore, parties making such claims could secure a judgment awarding substantial damages, as well as injunctive or other equitable relief, which could effectively block our ability to make, use, or sell our products in the United States or abroad. Such a judgment could have a material adverse effect on our business, operating results, and financial condition. In addition, we are obligated under certain agreements to indemnify the other party in connection with infringement by us of the proprietary rights of third parties. In the event that we are required to indemnify parties under these agreements, it could have a material adverse effect on our business, financial condition, and results of operations.

We may incur substantial expenses and divert management resources in prosecuting others for their unauthorized use of our intellectual property rights.

Other companies, including our competitors, may develop technologies that are similar or superior to our technologies, duplicate our technologies, or design around our patents, and may have or obtain patents or other proprietary rights that would prevent, limit, or interfere with our ability to make, use, or sell our products. Although we do not have foreign operations at this time, we may compete for contracts in non-US countries from time to time. Effective intellectual property protection may be unavailable, or limited, in some foreign countries in which we may do business, such as China. Unauthorized parties may attempt to copy or otherwise use aspects of our technologies and products that we regard as proprietary. Our means of protecting our proprietary rights in the United States or abroad may not be adequate or competitors may independently develop similar technologies. If our intellectual property protection is insufficient to protect our intellectual property rights, we could face increased competition in the market for our technologies and products.

Should any of our competitors file patent applications or obtain patents that claim inventions also claimed by us, we may choose to participate in an interference proceeding to determine the right to a patent for these inventions, because our business would be harmed if we fail to enforce and protect our intellectual property rights. Even if the outcome is favorable, this proceeding could result in substantial cost to us and disrupt our business.

In the future, we also may need to file lawsuits to enforce our intellectual property rights, to protect our trade secrets, or to determine the validity and scope of the proprietary rights of others. This litigation, whether successful or unsuccessful, could result in substantial costs and diversion of resources, which could have a material adverse effect on our business, financial condition, and results of operations.

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If we are unable to apply technology effectively in driving value for our clients through technology-based solutions or gain internal efficiencies and effective internal controls through the application of technology and related tools, our operating results, client relationships, growth and compliance programs could be adversely affected.

Our future success depends, in part, on our ability to anticipate and respond effectively to the threat and opportunity presented by digital disruption and developments in technology. These may include new software applications or related services based on artificial intelligence, machine learning, or robotics. We may be exposed to competitive risks related to the adoption and application of new technologies by established market participants (for example, through disintermediation) or new entrants, start-up companies and others. These new entrants are focused on using technology and innovation, including artificial intelligence to simplify and improve the client experience, increase efficiencies, alter business models and effect other potentially disruptive changes in the industries in which we operate. We must also develop and implement technology solutions and technical expertise among our employees that anticipate and keep pace with rapid and continuing changes in technology, industry standards, client preferences and internal control standards. We may not be successful in anticipating or responding to these developments on a timely and cost-effective basis and our ideas may not be accepted in the marketplace. Additionally, the effort to gain technological expertise and develop new technologies in our business requires us to incur significant expenses. If we cannot offer new technologies as quickly as our competitors, or if our competitors develop more cost-effective technologies or product offerings, we could experience a material adverse effect on our operating results, client relationships, growth and compliance programs.

We are dependent on information technology networks and systems to securely process, transmit and store electronic information and to communicate among our locations around the world and with our people, clients, partners and vendors. As the breadth and complexity of this infrastructure continues to grow, including as a result of the use of mobile technologies, social media and cloud-based services, the risk of security breaches and cyberattacks increases. Such breaches could lead to shutdowns or disruptions of or damage to our systems and those of our clients, alliance partners and vendors, and unauthorized disclosure of sensitive or confidential information, including personal data. In the past, we have experienced data security breaches resulting from unauthorized access to our and our service providers’ systems, which to date have not had a material impact on our operations; however, there is no assurance that such impacts will not be material in the future.

In providing services and solutions to clients, we often manage, utilize and store sensitive or confidential client data, including personal data, and we expect these activities to increase, including through the use of artificial intelligence, the internet of things and analytics. Unauthorized disclosure of sensitive or confidential client data, whether through systems failure, employee negligence, fraud, misappropriation, or other intentional or unintentional acts, could damage our reputation, cause us to lose clients and could result in significant financial exposure. Similarly, unauthorized access to our or through our or our service providers’ information systems or those we develop for our clients, whether by our employees or third parties, including a cyberattack by computer programmers, hackers, members of organized crime and/or state-sponsored organizations, who continuously develop and deploy viruses, ransomware or other malicious software programs or social engineering attacks, could result in negative publicity, significant remediation costs, legal liability, damage to our reputation and government sanctions and could have a material adverse effect on our results of operations. Cybersecurity threats are constantly expanding and evolving, thereby increasing the difficulty of detecting and defending against them and maintaining effective security measures and protocols.

We depend on key personnel who would be difficult to replace, and our business plan will likely be harmed if we lose their services or cannot hire additional qualified personnel.

Our success depends substantially on the efforts and abilities of our senior management and certain key personnel. The competition for qualified management and key personnel, especially engineers, is intense. Although we maintain non-competition and non-disclosure covenants with all our key personnel, we do not have employment agreements with most of them. The loss of services of one or more of our key employees, or the inability to hire, train, and retain key personnel, especially engineers and technical support personnel, could delay the development and sale of our products, disrupt our business, and interfere with our ability to execute our business plan.

Due to our dependence on a limited number of customers, we are subject to a concentration of credit risk.

As of December 31, 2019, two customers accounted for 78% of our accounts receivable. In the case of insolvency by one of our significant customers, accounts receivable with respect to that customer might not be collectible, might not be fully collectible, or might be collectible over longer than normal terms, each of which could adversely affect our financial position. Additionally, our three largest customers accounted for approximately 71% of our total revenues as of December 31, 2019. This concentration of credit risk makes us more vulnerable economically. The loss of any of these customers could materially reduce our revenues and net income, which could have a material adverse effect on our business.

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Potential strategic alliances may not achieve their objectives, and the failure to do so could impede our growth.

We may enter into strategic alliances. Among other matters, we continually explore strategic alliances designed to enhance or complement our technology or to work in conjunction with our technology; to provide necessary know-how, components, or supplies; to attract additional customers; and to develop, introduce, and distribute products utilizing our technology. Any strategic alliances may not achieve their intended objectives, and parties to our strategic alliances may not perform as contemplated. The failure of these alliances may impede our ability to introduce new products.

The Company owes the IRS penalty payments in connection with the delinquent payment of payroll taxes.

In 2016 the Company was notified by the IRS that it had been delinquent in the payment of payroll taxes. As of the date hereof, the Company has paid its payroll taxes in full. However, the Company had previously appealed to the IRS for a reduction of penalty payments assessed for the late payment of payroll taxes. The IRS has since responded, and the Company will be required to repay the penalties in connection with the delinquent payroll taxes. Beginning in July 2018, the Company has made monthly payments in the amount of $15,000 in order to pay down the accrued late fees. At December 31, 2019, the payroll taxes payable balance of $115,111 includes accrued late fees in the amount of $37,210.  The Company paid the final balance due on January 22, 2020.

Risks Related to Our Common Stock

There is currently not an active liquid trading market for the Company’s common stock.

Our common stock is quoted on the Nasdaq Capital Market tier under the symbol “DUOT”. However, there is currently limited active trading in our common stock. Although there are periodic volume spikes from time to time, we cannot give an assurance that a consistent, active trading market will develop. If an active market for our common stock develops, there is a significant risk that our stock price may fluctuate in the future in response to any of the following factors, some of which are beyond our control:

You may experience dilution of your ownership interest due to future issuance of our securities.

We are in a capital-intensive business and we may not have sufficient funds to finance the growth of our business or to support our projected capital expenditures. As a result, we may require additional funds from future equity or debt financings, including potential sales of preferred shares or convertible debt, to complete the development of new projects and pay the general and administrative costs of our business. We may in the future issue our previously authorized and unissued securities, resulting in the dilution of the ownership interests of holders of our common stock. We are currently authorized to issue 500,000,000 shares of common stock and 10,000,000 shares of preferred stock. We may also issue additional shares of common stock or other securities that are convertible into or exercisable for common stock in future public offerings or private placements for capital raising purposes or for other business purposes. The future issuance of a substantial number of common stocks into the public market, or the perception that such issuance could occur, could adversely affect the prevailing market price of our common shares. A decline in the price of our common stock could make it more difficult to raise funds through future offerings of our common stock or securities convertible into common stock.

Our Board of Directors may issue and fix the terms of shares of our Preferred Stock without stockholder approval, which could adversely affect the voting power of holders of our Common Stock or any change in control of our Company.

Our Articles of Incorporation authorize the issuance of up to 10,000,000 shares of "blank check" preferred stock, with such designation rights and preferences as may be determined from time to time by the Board of Directors. Our Board of Directors is empowered, without shareholder approval, to issue shares of preferred stock with dividend, liquidation, conversion, voting or other rights which could adversely affect the voting power or other rights of the holders of our common stock. In the event of such issuances, the preferred stock could be used, under certain circumstances, as a method of discouraging, delaying or preventing a change in control of our company. 

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We do not expect to pay dividends and investors should not buy our common stock expecting to receive dividends.

We do not anticipate that we will declare or pay any dividends in the foreseeable future. Consequently, you will only realize an economic gain on your investment in our common stock if the price appreciates. You should not purchase our common stock expecting to receive cash dividends. Since we do not pay dividends, and if an active trading market for our shares does not develop, then you may not have any manner to liquidate or receive any payment on your investment. Therefore, our failure to pay dividends may cause you to not see any return on your investment even if we are successful in our business operations. In addition, because we do not pay dividends, we may have trouble raising additional funds which could affect our ability to expand our business operations.

Our operating results are likely to fluctuate from period to period.

We anticipate that there may be fluctuations in our future operating results. Potential causes of future fluctuations in our operating results may include:

Our business, financial condition and results of operations could be materially adversely affected by various risks, including, but not limited to the principal risks noted below.

We are subject to the Florida anti-takeover provisions, which may prevent you from exercising a vote on business combinations, mergers or otherwise.

As a Florida corporation, we are subject to certain anti-takeover provisions that apply to public corporations under Florida law. Pursuant to Section 607.0901 of the Florida Business Corporation Act, or the Florida Act, a publicly held Florida corporation may not engage in a broad range of business combinations or other extraordinary corporate transactions with an interested shareholder without the approval of the holders of two-thirds of the voting shares of the corporation (excluding shares held by the interested shareholder), unless the:

An interested shareholder is defined as a person who together with affiliates and associates beneficially owns more than 10% of a corporation’s outstanding voting shares. We have not made an election in our amended Articles of Incorporation to opt out of Section 607.0901.

In addition, we are subject to Section 607.0902 of the Florida Act which prohibits the voting of shares in a publicly held Florida corporation that are acquired in a control share acquisition unless (i) our board of directors approved such acquisition prior to its consummation or (ii) after such acquisition, in lieu of prior approval by our board of directors, the holders of a majority of the corporation’s voting shares, exclusive of shares owned by officers of the corporation, employee directors or the acquiring party, approve the granting of voting rights as to the shares acquired in the control share acquisition. A control share acquisition is defined as an acquisition that immediately thereafter entitles the acquiring party to 20% or more of the total voting power in an election of directors.

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains forward-looking statements. Forward-looking statements give our current expectations or forecasts of future events. You can identify these statements by the fact that they do not relate strictly to historical or current facts. Forward-looking statements involve risks and uncertainties and include statements regarding, among other things, our projected revenue growth and profitability, our growth strategies and opportunity, anticipated trends in our market and our anticipated needs for working capital. They are generally identifiable by use of the words “may,” “will,” “should,” “anticipate,” “estimate,” “plans,” “potential,” “projects,” “continuing,” “ongoing,” “expects,” “management believes,” “we believe,” “we intend” or the negative of these words or other variations on these words or comparable terminology. These statements may be found under the sections entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Business,” as well as in this prospectus generally. In particular, these include statements relating to future actions, prospective products, market acceptance, future performance or results of current and anticipated products, sales efforts, expenses, and the outcome of contingencies such as legal proceedings and financial results.

Examples of forward-looking statements in this prospectus include, but are not limited to, our expectations regarding our business strategy, business prospects, operating results, operating expenses, working capital, liquidity and capital expenditure requirements. Important assumptions relating to the forward-looking statements include, among others, assumptions regarding demand for our products, the cost, terms and availability of components, pricing levels, the timing and cost of capital expenditures, competitive conditions and general economic conditions. These statements are based on our management’s expectations, beliefs and assumptions concerning future events affecting us, which in turn are based on currently available information. These assumptions could prove inaccurate. Although we believe that the estimates and projections reflected in the forward-looking statements are reasonable, our expectations may prove to be incorrect.

Important factors that could cause actual results to differ materially from the results and events anticipated or implied by such forward-looking statements include, but are not limited to:

We operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for us to predict all of those risks, nor can we assess the impact of all of those risks on our business or the extent to which any factor may cause actual results to differ materially from those contained in any forward-looking statement. The forward-looking statements in this prospectus are based on assumptions management believes are reasonable. However, due to the uncertainties associated with forward-looking statements, you should not place undue reliance on any forward-looking statements. Further, forward-looking statements speak only as of the date they are made, and unless required by law, we expressly disclaim any obligation or undertaking to publicly update any of them in light of new information, future events, or otherwise.

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USE OF PROCEEDS

We will not receive any proceeds from the sale of common stock by the Selling Stockholders. All of the net proceeds from the sale of our common stock will go to the Selling Stockholders as described below in the sections entitled “Selling Stockholders” and “Plan of Distribution”. We have agreed to bear the expenses relating to the registration of the common stock for the Selling Stockholders.

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DETERMINATION OF OFFERING PRICE

The selling stockholder will offer common stock at the prevailing market prices or privately negotiated prices.  The offering price of our common stock does not necessarily bear any relationship to our book value, assets, past operating results, financial condition or any other established criteria of value.  Our common stock may not trade at the market prices in excess of the offering prices for common stock in any public market will be determined in the marketplace and may be influenced by many factors, including the depth and liquidity. You should not assume or expect that our shares of common stock will trade at or above the exercise prices or the educed exercise price of the Warrants in any given time period.

DILUTION

Not applicable. The shares registered under the registration statement of which this prospectus forms a part are not being offered for purchase. The shares are being registered on behalf of the selling stockholders.

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SELLING SECURITY HOLDERS

The common stock being offered by the Selling Stockholders are those previously issued to the Selling Stockholders, and those issuable to the Selling Stockholders, upon exercise of the warrants and conversion of the Series B Preferred Stock. We are registering the shares of common stock in order to permit the Selling Stockholders to offer the shares for resale from time to time. Except for the ownership of the shares of Series B Preferred Stock, common stock and the warrants, the Selling Stockholders have not had any material relationship with us within the past three years.

The table below lists the Selling Stockholders and other information regarding the beneficial ownership of the shares of common stock by each of the Selling Stockholders. The second column lists the number of shares of common stock beneficially owned by each Selling Stockholder, based on its ownership of the shares of preferred stock, common stock and warrants, as of the date hereof, assuming conversion of the Series B Preferred Stock and exercise of the warrants held by the Selling Stockholders on such date, without regard to any limitations on conversions or exercises. The third column lists the shares of common stock being offered by this prospectus by the Selling Stockholders.

In accordance with the terms of a registration rights agreement with the Selling Stockholders, this prospectus generally covers the resale of the sum of (i) the number of shares of common stock issued to the Selling Stockholders in the Private Offering (ii) the maximum number of shares of common stock issuable upon conversion of the related preferred stock, determined as if the outstanding shares of preferred stock were converted in full as of the trading day immediately preceding the date this registration statement was initially filed with the SEC, and (iii) the maximum number of shares of common stock issuable upon exercise of the related warrants, determined as if the outstanding warrants were exercised in full as of the trading day immediately preceding the date this registration statement was initially filed with the SEC, each as of the trading day immediately preceding the applicable date of determination and all subject to adjustment as provided in the registration right agreement, without regard to any limitations on the exercise of the warrants or the conversion of the preferred stock. The fourth column assumes the sale of all of the shares offered by the Selling Stockholders pursuant to this prospectus.

Under the terms of the warrants and the Series B Preferred Certificate of Designation, a Selling Stockholder may not exercise the warrants or convert the Series B Preferred Stock to the extent such exercise or conversion would cause such Selling Stockholder, together with its affiliates and attribution parties, to beneficially own a number of shares of common stock which would exceed 9.99% of our then outstanding common stock following such exercise or conversion, excluding for purposes of such determination shares of common stock issuable upon exercise of the warrants which have not been exercised and shares of common stock issuable upon conversion of the preferred stock which has not been converted. The number of shares in the second column does not reflect this limitation. The Selling Stockholders may sell all, some or none of their shares in this offering. See “Plan of Distribution.”

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