<?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>0001375556</rptOwnerCik>
            <rptOwnerName>Hackworth Bryan M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>15147 NORTH SCOTTSDALE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>H300</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>SVP and CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11200</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>56572</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-02-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>28000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>28000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>48185</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Performance Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F4"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-02-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>27999</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>27999</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>27999</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (Rt to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>62.70</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-02-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F6"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15300</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2018-02-08</value>
            </exerciseDate>
            <expirationDate>
                <value>2024-02-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15300</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>136800</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These shares are held in the Hackworth Living Trust. Mr. Hackworth disclaims beneficial ownership of the shares.</footnote>
        <footnote id="F2">Each restricted stock unit represents a contingent right to receive one share of UEI common stock.</footnote>
        <footnote id="F3">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="F4">Each performance stock unit represents a contingent right to receive one share of UEI common stock.</footnote>
        <footnote id="F5">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="F6">Expiry of Employee Stock Options.</footnote>
        <footnote id="F7">This figure represents an aggregate number of stock options held by Reporting Person.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Bryan M. Hackworth, by Richard A. Firehammer, Jr., pursuant to Limited Power of Attorney dated August 5, 2006 (attached)</signatureName>
        <signatureDate>2024-02-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0508
4
2024-02-07
0
0000101984
UNIVERSAL ELECTRONICS INC
UEIC
0001375556
Hackworth Bryan M
15147 NORTH SCOTTSDALE ROAD
H300
SCOTTSDALE
AZ
85254
0
1
0
0
SVP and CFO
0
Common Stock
11200
D
Common Stock
56572
I
By Trust
Restricted Stock Units
2024-02-07
4
A
0
28000
0
A
Common Stock
28000
48185
D
Performance Stock Units
2024-02-07
4
A
0
27999
0
A
Common Stock
27999
27999
D
Employee Stock Option (Rt to Buy)
62.70
2024-02-08
4
J
0
15300
0
D
2018-02-08
2024-02-08
Common Stock
15300
136800
D
These shares are held in the Hackworth Living Trust. Mr. Hackworth disclaims beneficial ownership of the shares.
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.
Expiry of Employee Stock Options.
This figure represents an aggregate number of stock options held by Reporting Person.
/s/Bryan M. Hackworth, by Richard A. Firehammer, Jr., pursuant to Limited Power of Attorney dated August 5, 2006 (attached)
2024-02-09