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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-12-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001216543</rptOwnerCik>
            <rptOwnerName>ARLING PAUL D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>15147 N SCOTTSDALE RD STE H300</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SCOTTSDALE</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85254</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2024-12-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>13185</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>11.7251</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>283615</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Arling Family Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1800</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (Rt to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>418830</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Performance Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F6"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F7"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F7"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>36000</value>
                    <footnoteId id="F8"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F9"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F10"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F10"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>63103</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>63103</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The total shares held indirectly by the Arling Family Trust have been increased by 12,547 shares and the total shares held directly by Mr. Arling have been decreased by 12,547 shares to correctly reflect ownership form.</footnote>
        <footnote id="F2">These shares are held by the Arling Family Trust. Mr. Arling disclaims beneficial ownership of the shares held by the Trust.</footnote>
        <footnote id="F3">Exercise Price determined in accordance with the terms of the Company's applicable Stock Incentive Plan.</footnote>
        <footnote id="F4">The Exercisable and Expiration Dates were reported at the time the Stock Options were granted.</footnote>
        <footnote id="F5">This figure represents an aggregate number of stock options held by Reporting Person.</footnote>
        <footnote id="F6">Each performance stock unit represents a contingent right to receive one share of UEI common stock.</footnote>
        <footnote id="F7">The performance stock units vest in accordance with the vesting schedule of each PSU grant.</footnote>
        <footnote id="F8">This figure represents an aggregate number of performance stock units held by Reporting Person.</footnote>
        <footnote id="F9">Each restricted stock unit represents a contingent right to receive one share of UEI common stock.</footnote>
        <footnote id="F10">The restricted stock units vest in accordance with the vesting schedule of each RSU grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Paul D. Arling, by Kristin Cazarez, pursuant to Limited Power of Attorney dated May 7, 2024</signatureName>
        <signatureDate>2024-12-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
[{"type": "4", "sequence": "1", "filename": "wk-form4_1734046181.xml", "description": "FORM 4", "secsgml_size_bytes": 9813}]
X0508
4
2024-12-11
0
0000101984
UNIVERSAL ELECTRONICS INC
UEIC
0001216543
ARLING PAUL D
15147 N SCOTTSDALE RD STE H300
SCOTTSDALE
AZ
85254
1
1
0
0
CEO
0
Common Stock
2024-12-11
4
S
0
13185
11.7251
D
283615
I
By Arling Family Trust
Common Stock
1800
D
Common Stock
1000
I
By Spouse
Employee Stock Option (Rt to Buy)
Common Stock
0
418830
D
Performance Stock Units
Common Stock
0
36000
D
Restricted Stock Units
Common Stock
63103
63103
D
The total shares held indirectly by the Arling Family Trust have been increased by 12,547 shares and the total shares held directly by Mr. Arling have been decreased by 12,547 shares to correctly reflect ownership form.
These shares are held by the Arling Family Trust. Mr. Arling disclaims beneficial ownership of the shares held by the Trust.
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.
Each performance stock unit represents a contingent right to receive one share of UEI common stock.
The performance stock units vest in accordance with the vesting schedule of each PSU grant.
This figure represents an aggregate number of performance stock units held by Reporting Person.
Each restricted stock unit represents a contingent right to receive one share of UEI common stock.
The restricted stock units vest in accordance with the vesting schedule of each RSU grant.
/s/Paul D. Arling, by Kristin Cazarez, pursuant to Limited Power of Attorney dated May 7, 2024
2024-12-12