<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-02-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000101984</issuerCik>
        <issuerName>UNIVERSAL ELECTRONICS INC</issuerName>
        <issuerTradingSymbol>UEIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001801194</rptOwnerCik>
            <rptOwnerName>Ammari Ramzi</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>15147 N. SCOTTSDALE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SCOTTSDALE</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85254</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr.VP Corp Planning &amp; Strategy</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>23372</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-02-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>24000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>24000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>41835</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Performance Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-02-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>24000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>24000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>24000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (Rt to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F5"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>97280</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each restricted stock unit represents a contingent right to receive one share of UEI common stock.</footnote>
        <footnote id="F2">Restricted Stock Grant was approved by the Compensation Committee of the Board of Directors on January 25, 2024 and ratified and approved by the Board of Directors on February 7, 2024 and granted on February 7, 2024.  The  shares will vest over 3 years with 33.33% vesting on the first anniversary of the grant date and 8.33% vesting on each quarterly anniversary of the grant date thereafter.  The shares will be fully vested on the third anniversary of the grant date.</footnote>
        <footnote id="F3">Each performance stock unit represents a contingent right to receive one share of UEI common stock.</footnote>
        <footnote id="F4">Performance Stock Grant was approved by the Compensation Committee of the Board of Directors on January 25, 2024 and ratified and approved by the Board of Directors on February 7, 2024, and granted on February 7, 2024. The performance stock unit awards will vest in 3 separate tranches with 3 separate stock price and service conditions. Each tranche will vest only when both the stock price and service conditions have been achieved. The stock price condition for each tranche must be met on or by the third anniversary of the grant (2/7/2027). Any unvested tranche will expire at close of business on 2/7/2027.</footnote>
        <footnote id="F5">Exercise Price determined in accordance with the terms of the Company's applicable Stock Incentive Plan.</footnote>
        <footnote id="F6">The Exercisable and Expiration Dates were reported at the time the Stock Options were granted.</footnote>
        <footnote id="F7">This figure represents an aggregate number of stock options held by Reporting Person.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Ramzi Ammari, by Valerie J. Ballard, pursuant to Limited Power of Attorney dated January 22, 2020</signatureName>
        <signatureDate>2024-02-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0508
4
2024-02-07
0
0000101984
UNIVERSAL ELECTRONICS INC
UEIC
0001801194
Ammari Ramzi
15147 N. SCOTTSDALE ROAD
SCOTTSDALE
AZ
85254
0
1
0
0
Sr.VP Corp Planning & Strategy
0
Common Stock
23372
D
Restricted Stock Units
2024-02-07
4
A
0
24000
0
A
Common Stock
24000
41835
D
Performance Stock Units
2024-02-07
4
A
0
24000
0
A
Common Stock
24000
24000
D
Employee Stock Option (Rt to Buy)
Common Stock
0
97280
D
Each restricted stock unit represents a contingent right to receive one share of UEI common stock.
Restricted Stock Grant was approved by the Compensation Committee of the Board of Directors on January 25, 2024 and ratified and approved by the Board of Directors on February 7, 2024 and granted on February 7, 2024.  The  shares will vest over 3 years with 33.33% vesting on the first anniversary of the grant date and 8.33% vesting on each quarterly anniversary of the grant date thereafter.  The shares will be fully vested on the third anniversary of the grant date.
Each performance stock unit represents a contingent right to receive one share of UEI common stock.
Performance Stock Grant was approved by the Compensation Committee of the Board of Directors on January 25, 2024 and ratified and approved by the Board of Directors on February 7, 2024, and granted on February 7, 2024. The performance stock unit awards will vest in 3 separate tranches with 3 separate stock price and service conditions. Each tranche will vest only when both the stock price and service conditions have been achieved. The stock price condition for each tranche must be met on or by the third anniversary of the grant (2/7/2027). Any unvested tranche will expire at close of business on 2/7/2027.
Exercise Price determined in accordance with the terms of the Company's applicable Stock Incentive Plan.
The Exercisable and Expiration Dates were reported at the time the Stock Options were granted.
This figure represents an aggregate number of stock options held by Reporting Person.
/s/Ramzi Ammari, by Valerie J. Ballard, pursuant to Limited Power of Attorney dated January 22, 2020
2024-02-09