Exhibit 4.1


 


Description of Capital Stock


 


The following is brief description of our capital stock as
set forth in our amended and restated certificate of incorporation (“Certificate of Incorporation”) and amended and
restated bylaws (“Bylaws”). This summary does not purport to be complete and is qualified in its entirety by reference
to our Certificate of Incorporation and Bylaws, copies of which have been filed as exhibits to our SEC filings.


 


Common Stock


 


We may issue shares of our common stock from time to time.
We are authorized to issue up to 100,000,000 shares of common stock, par value $0.0001 per share. As of August 30, 2019,
there were 22,935,349 shares of common stock issued and outstanding. Each outstanding share of common stock is entitled to one
vote on all matters submitted to a vote of stockholders. Holders of common stock are entitled to receive ratably such dividends,
if any, as may be declared by the Board out of funds legally available therefor. Upon the liquidation, dissolution, or winding
up of the Company, the holders of common stock are entitled to share ratably in all of our assets which are legally available
for distribution after payment of all debts and other liabilities and liquidation preference of any outstanding preferred stock.
Holders of common stock have no preemptive, subscription, redemption or conversion rights. The outstanding shares of common stock
are validly issued, fully paid and non-assessable. The rights, preferences and privileges of the holders of common stock are subject
to, and may be adversely affected by, the rights of the holders of shares of any series of preferred stock that we might designate
in the future.


 


Preferred Stock


 


We are authorized to issue up to 5,000,000 shares of preferred
stock, par value $0.0001 per share. As of August 30, 2019, no shares of our preferred stock were outstanding. Each share
of preferred stock is entitled to the number of votes equal to the number of shares of common stock into which each share of preferred
stock could be converted at the record date for determination of the stockholders entitled to vote on such matters, or, if no
such record date is established, at the date such vote is taken or any written consent of stockholders is solicited, such votes
to be counted together with all other shares of stock having general voting power and not separately as a class. The terms of
any series of preferred stock will be set forth in an amendment to our Certificate of Incorporation.


 


Delaware Law and Certain Certificate of Incorporation and Bylaw
Provisions


 


Our Certificate of Incorporation and Bylaws contain a number
of provisions that could make our acquisition by means of a tender or exchange offer, a proxy contest or otherwise more difficult.
Certain of these provisions are summarized below:


 


	 	•	Under our Bylaws, only the Board, the Chairperson
    of the Board, the chief executive officer or president (in the absence of a chief executive officer) may call special meetings
    of stockholders.


 


	 	•	Our Bylaws establish advance notice procedures
    for stockholder proposals and the nomination of candidates for election as directors, other than nominations made by or at
    the direction of the Board or a committee of the Board.


 


	 	•	We are subject to the provisions of Section 203
    of the Delaware General Corporation Law. Section 203 prohibits a publicly-held Delaware corporation from engaging in
    a “business combination” with an “interested stockholder” for a period of three years after the person
    became an interested stockholder, unless the business combination is approved in a prescribed manner. A “business combination”
    includes mergers, asset sales and other transactions resulting in a financial benefit to the interested stockholder. Subject
    to certain exceptions, an “interested stockholder” is a person who, together with affiliates and associates, owns,
    or within the prior three years did own, 15% or more of the corporation’s voting stock.


 


	 	•	Our Certificate of Incorporation eliminates
    the right of stockholders to act by written consent without a meeting.


 


	 	•	Our Certificate of Incorporation and Bylaws
    do not provide for cumulative voting in the election of directors.


 


The amendment of many of the provisions described above would
require approval by holders of at least 66 2/3% of the outstanding shares of our common stock.


 


Nasdaq Capital Market


 


Our common stock is listed on the Nasdaq Capital Market and
traded under the symbol “LTRX.” On August 30, 2019, the last reported sale price for our common stock on the NASDAQ
Capital Market was $3.28 per share.


 


Transfer Agent and Registrar


 


The transfer agent and registrar for our common stock is Computershare
Shareowner Services, LLC.