2AABM-680755Bluetooth Speaker

FCC Statement: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) Thisdevice may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This Equipment generates,uses and can radiate radio frequency energy and,if not installed and used in accordance with the instructions,may cause harmful interference to radio communications.However,there is no guarantee that interference will not occur in a Particular installation.If thise quipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help. Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

Attestation S tate ments 2024庐03- 2 0 TO: Federal Communications Commissio n Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 2104 , USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC IDl#l2AABM- 68 0755 {TECH-AUDIO CO.,LTD.1 the undersigned, hereby authorize {Ac.e Result LLClto act as our designated U.S. a gent for service of pro cess, {TECH-AUDIO co.,L TD.} accepts to maintain a n agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. ( Ace Result LLC) accepts the responsibility to act as designated U.S. agent for service of process, p「ovides an agent for no less than one year after the grantee has terminated all marketing and impoJ:.ta.llim.__or the conclL』sio.且豆E皿悦豆豆mmis_5ion二relate吐Q[Q.C e J· involving the equipment. A pplicant Information: Company name: TECH-AUDIO CO.,LTD Contact Name:Zengxiaoping Address: No. 14, Aly. 5, Ln. 216, Zhongxing Rd., Longtan Dist., Taoyuan City 325, Taiwan Telephone No: 479 1018 Email: [email protected] FRN: 0022683056 U.S. Agent Information: Company Name: Ace Result LLC Address: 50 Earl's Way Franklin, MA 02038,USA Co ntact Name: Boukay Sung Telephone No: 125593 3 Em ail: [email protected] FRN:0035152206 川，t到gnature：�叫 Applicant printed name: TECH-AUDIO CO.,L TD 句et Si (if the agent is differe『1tfrom the applicant) Agent printed name: Ac.e Resl』ItLLC

TECH‐AUDIO CO., LTD (2024.03.25) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2AABM‐680755) [TECH‐AUDIO CO., LTD ] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, (Applicant signature) (Applicant printed name) Xiaoping Zeng TECH‐AUDIO CO., LTD (2024.03.25) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2AABM‐680755) [TECH‐AUDIO CO., LTD ] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Xiaoping Zeng

TECH-AUDIO CO., LTD Agent Authorization Letter 2024-03-25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen Most Technology Service Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Name: Xiaoping Zeng Position: Manager Company Name: TECH-AUDIO CO., LTD Address: No. 14, Aly. 5, Ln. 216, Zhongxing Rd.,Longtan Dist.,Taoyuan City 325,Taiwan Tel / Fax +86-592-7231502/+86-592-6023178 E-Mail: [email protected]

TECH-AUDIO CO., LTD Long Term Confidentiality Request Letter 2024-03-25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR (FCC ID: 2AABM-680755) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - e.g. Block diagram - e.g. SCH - e.g. Operational Description required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Name: Xiaoping Zeng Position: Manager Company Name: TECH-AUDIO CO., LTD Address: No. 14, Aly. 5, Ln. 216, Zhongxing Rd.,Longtan Dist.,Taoyuan City 325,Taiwan Tel / Fax +86-592-7231502/+86-592-6023178 E-Mail: [email protected]

Modeldifferenceletter 2024.3.25 DearMETReviewer, ThisisanewApplicationfromTECH-AUDIOCO.,LTD ModelNo.:Nexa1,Nexa2,Nexa3,Nexa4,NexaX,Nexa1Pro,Nexa2Pro, Nexa3Pro,Nexa1Ultra.Nexa2Ultra.Nexa3Ultra,Nexa1Mini,Nexa2 Mini,Nex3Mini,A1,A2,A3,A1Elite,A2Elite,A3Elite OnlythemodelNexa1wastested,Modelnameandcoloraredifferent,Their electricalcircuitdesign,layout,componentsusedandinternalwiringare identical ， Onlythemodelnamesandappearancearedifferent Thankyouforyourcooperation! Yourssincerely, Signatory: Name:XiaopingZeng Position:Manager CompanyName: TECH-AUDIOCO.,LTD Address:No.14,Aly.5,Ln.216,ZhongxingRd.,LongtanDist.,TaoyuanCity325,Taiwan Tel/Fax+86-592-7231502/+86-592-6023178 E-Mail:[email protected]

Model No.: Nexa 1 FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: Nexa 1 LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: Nexa 1 TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE Model No.: Nexa 1

Label location

ModelNo.:Nexa1 Page1of3 INTERNALPHOTOOFSAMPLE INTERNALPHOTOOFSAMPLEPCB ModelNo.: Nexa 1 Page 2 of 3 INTERNALPHOTOOF SAMPLEPCB INTERNALPHOTOOF SAMPLEPCB BT antenna ModelNo.:Nexa1 Page3of3 Battery

ShenzhenMostTechnologyServiceCo.,Ltd. EastA,1floorofNewAolinFactorybuiding,LangshanErlu,NorthDistrict, Hi-techIndustryPark,Nanshan,Shenzhen,Guangdong,China RFExposureEvaluationReport ReportReferenceNo. ....................... : FCCID.. .............................................. : MTEB24020084-H 2AABM-680755 Compiledby (position+printedname+signature)..:FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature) .. : ManagerYvetteZhou Dateofissue ......................................... :February21,2024 RepresentativeLaboratoryName . :ShenzhenMostTechnologyServiceCo.,Ltd. Address.................................................: No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark, Nanshan,Shenzhen,Guangdong,China. Applicant’sname...............................:TECH-AUDIOCO.,LTD Address ................................................. : No.14,Aly.5,Ln.216,ZhongxingRd.,LongtanDist.,TaoyuanCity 325,Taiwan Testspecification/Standard............: 47CFRPart1.1307;47CFRPart1.1310 KDB447498D01GeneralRFExposureGuidancev06 TRFOriginator......................................:ShenzhenMostTechnologyServiceCo.,Ltd. ShenzhenMostTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenMostTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenMostTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription........................: BluetoothSpeaker TradeMark ............................................ : N/A Model/Typereference ......................... : Nexa1 ListedModels ..................................... :Nexa2,Nexa3,Nexa4,NexaX,Nexa1Pro,Nexa2Pro,Nexa3 Pro,Nexa1Ultra.Nexa2Ultra.Nexa3Ultra,Nexa1Mini,Nexa2 Mini,Nex3Mini,A1,A2,A3,A1Elite,A2Elite,A3Elite ModulationType..................................: GFSK,π/4DQPSK,8DPSK OperationFrequency .......................... : From2402MHzto2480MHz HardwareVersion................................. V1.1 SoftwareVersion ................................... V1.1 Rating.....................................................: POWERInput:TYPE-C5V/2.1A Battery:7.2V/2500mAH Result.....................................................:PASS ReportNo.:MTEB24020084-H Page2of5 TESTREPORT EquipmentunderTest:BluetoothSpeaker Model/Type:Nexa1 ListedModels: Nexa2,Nexa3,Nexa4,NexaX,Nexa1Pro,Nexa2Pro,Nexa 3Pro,Nexa1Ultra.Nexa2Ultra.Nexa3Ultra,Nexa1 Mini,Nexa2Mini,Nex3Mini,A1,A2,A3,A1Elite,A2Elite,A3 Elite Remark Themodelnameisdifferentandtheappearanceisdifferent, andtherestremainsunchanged. Applicant: TECH-AUDIOCO.,LTD Address: No.14,Aly.5,Ln.216,ZhongxingRd.,LongtanDist.,Taoyuan City325,Taiwan Manufacturer: XIAMENTECH-SOUNDCO.,LTD Address : NO.170,JiYinRoad,TongAnDistrict,Xiamen,China. TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB24020084-H Page3of5 1.RevisionHistory RevisionIssueDateRevisionsRevisedBy 002024-02-21InitialIssueAlisaLuo ReportNo.:MTEB24020084-H Page4of5 2.SAREvaluation 2.1RFExposureComplianceRequirement 2.1.1StandardRequirement AccordingtoKDB447498D01GeneralRFExposureGuidancev06 4.3.1.StandaloneSARtestexclusionconsiderations UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone1-gheador bodyand10-gextremitySARevaluationforgeneralpopulationexposureconditions,bymeasurementor numericalsimulation,isnotrequiredwhenthecorrespondingSARExclusionThresholdcondition,listed below,issatisfied. 2.1.2Limits The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparationdistances≤ 50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance,mm)]·[√ f(GHz)]≤3.0for1-gSARand≤7.5for10-gextremitySAR,where Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mmand fortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtestseparation distanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion ReportNo.:MTEB24020084-H Page5of5 2.1.3EUTRFExposure BTclassic GFSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)1.3591.359±12.359 Middle(2441MHz)3.0473.047±14.047 Highest(2480MHz)2.8162.816±13.816 π/4DQPSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)0.1530.153±11.153 Middle(2441MHz)1.6051.605±12.605 Highest(2480MHz)1.7621.762±12.762 8DPSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)0.2090.209±11.209 Middle(2441MHz)1.8121.812±12.812 Highest(2480MHz)1.8031.803±12.803 Worstcase:GFSK Channel MaximumPeak Conducted OutputPower (dBm) Maximumtune-up Power Calculated value Exclusion threshold SARTest Exclusion (dBm)(mW) Lowest(2402MHz)3.0474.0472.540.653.0 Yes .......................THEENDOFREPORT.........................

ShenzhenMostTechnologyServiceCo.,Ltd. No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark,Nanshan, Shenzhen,Guangdong,China. TESTREPORT FCCRulesPart15.247 ReportReferenceNo........................: FCCID................................................: MTEB24020084-R 2AABM-680755 Compiledby (position+printedname+signature)..:FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature) .. : ManagerYvetteZhou Dateofissue.........................................:February21,2024 RepresentativeLaboratoryName.:ShenzhenMostTechnologyServiceCo.,Ltd. Address ................................................. : No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark, Nanshan,Shenzhen,Guangdong,China. Applicant’sname...............................:TECH-AUDIOCO.,LTD Address.................................................: No.14,Aly.5,Ln.216,ZhongxingRd.,LongtanDist.,TaoyuanCity 325,Taiwan Testspecification/Standard ............ : FCCRulesPart15.247 TRFOriginator......................................:ShenzhenMostTechnologyServiceCo.,Ltd. ShenzhenMostTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenMostTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenMostTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription........................: BluetoothSpeaker TradeMark ............................................ : N/A Model/Typereference.........................: Nexa1 ListedModels ..................................... : Nexa2,Nexa3,Nexa4,NexaX,Nexa1Pro,Nexa2Pro,Nexa3 Pro,Nexa1Ultra.Nexa2Ultra.Nexa3Ultra,Nexa1Mini,Nexa2 Mini,Nex3Mini,A1,A2,A3,A1Elite,A2Elite,A3Elite ModulationType..................................: GFSK,π/4DQPSK,8DPSK OperationFrequency .......................... : From2402MHzto2480MHz HardwareVersion ................................. V1.1 SoftwareVersion................................... V1.1 Rating.....................................................: POWERInput:TYPE-C5V/2.1A Battery:7.2V/2500mAH Result.....................................................:PASS ReportNo.:MTEB24020084-R Page2of56 TESTREPORT EquipmentunderTest:BluetoothSpeaker Model/Type:Nexa1 ListedModels: Nexa2,Nexa3,Nexa4,NexaX,Nexa1Pro,Nexa2Pro,Nexa 3Pro,Nexa1Ultra.Nexa2Ultra.Nexa3Ultra,Nexa1 Mini,Nexa2Mini,Nex3Mini,A1,A2,A3,A1Elite,A2Elite,A3 Elite Remark Themodelnameisdifferentandtheappearanceisdifferent, andtherestremainsunchanged. Applicant: TECH-AUDIOCO.,LTD Address: No.14,Aly.5,Ln.216,ZhongxingRd.,LongtanDist.,Taoyuan City325,Taiwan Manufacturer: XIAMENTECH-SOUNDCO.,LTD Address : NO.170,JiYinRoad,TongAnDistrict,Xiamen,China. TestResult : PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB24020084-R Page3of56 Contents 1REVISIONHISTORY...........................................................................................................................4 2TESTSTANDARDS..............................................................................................................................5 3SUMMARY.................................................................................................................................................6 3.1GeneralRemarks..........................................................................................................................................6 3.2ProductDescription.....................................................................................................................................6 3.3EquipmentUnderTest.................................................................................................................................6 3.4ShortdescriptionoftheEquipmentunderTest(EUT).............................................................................6 3.5EUToperationmode.....................................................................................................................................7 3.6BlockDiagramofTestSetup.......................................................................................................................7 3.7TestItem(EquipmentUnderTest)Description*........................................................................................7 3.8AuxiliaryEquipment(AE)Description........................................................................................................7 3.9AntennaInformation*...................................................................................................................................7 3.10RelatedSubmittal(s)/Grant(s).................................................................................................................8 3.11Modifications...............................................................................................................................................8 3.12EUTconfiguration.......................................................................................................................................8 4TESTENVIRONMENT........................................................................................................................9 4.1Addressofthetestlaboratory....................................................................................................................9 4.2Environmentalconditions............................................................................................................................9 4.3Summaryofmeasurementresults............................................................................................................10 4.4Statementofthemeasurementuncertainty.............................................................…

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ReportNo.:MTEB24020084-R Page45of56 OutOfBandEmission(Left) 8DPSK_3-DH5_ChannelHopping OutOfBandEmission(Right) 8DPSK_3-DH5_ChannelHopping ReportNo.:MTEB24020084-R Page46of56 APPENDIXVI.DutyCycle TestResult ModulationPacketsChannel OnTime (ms) Period(ms) DutyCycle (%) DutyCycle (linear) DutyCycle Factor(dB) GFSKDH5 02.8793.74576.880.76881.1419 392.8793.74576.880.76881.1419 782.8793.73577.090.77091.13 π/4DQPSK2-DH5 02.8893.73577.360.77361.1148 392.8793.73577.090.77091.13 782.8893.73577.360.77361.1148 8DPSK3-DH5 02.8893.74577.150.77151.1266 392.8793.73577.090.77091.13 782.8893.73577.360.77361.1148 TestGraphs GFSK(DH5)_Channel0 ReportNo.:MTEB24020084-R Page47of56 GFSK(DH5)_Channel39 GFSK(DH5)_Channel78 ReportNo.:MTEB24020084-R Page48of56 π/4DQPSK(2-DH5)_Channel0 π/4DQPSK(2-DH5)_Channel39 ReportNo.:MTEB24020084-R Page49of56 π/4DQPSK(2-DH5)_Channel78 8DPSK(3-DH5)_Channel0 ReportNo.:MTEB24020084-R Page50of56 8DPSK(3-DH5)_Channel39 8DPSK(3-DH5)_Channel78 ReportNo.:MTEB24020084-R Page51of56 APPENDIXVII.DwellTime TestResult ModulationPacketChannel Pulse Width(ms) Numberof Pulsesin 31.6 seconds DwellTime (ms) Limit(ms)Result GFSK DH1 CH39 (2441MHz) 0.3768317119.45 <400 PASS DH31.632155252.96PASS DH52.880115331.2PASS π/4DQPSK 2-DH10.3888319124.03PASS 2-DH31.632161262.75PASS 2-DH52.880102293.76PASS 8DPSK 3-DH10.3888318123.64PASS 3-DH31.632166270.91PASS 3-DH52.880104299.52PASS TestGraphs PulseWidth GFSK_DH1 NumberofPulsesin31.6seconds GFSK_DH1 PulseWidth GFSK_DH3 NumberofPulsesin31.6seconds GFSK_DH3 ReportNo.:MTEB24020084-R Page52of56 PulseWidth GFSK_DH5 NumberofPulsesin31.6seconds GFSK_DH5 PulseWidth π/4DQPSK_2-DH1 NumberofPulsesin31.6seconds π/4DQPSK_2-DH1 PulseWidth π/4DQPSK_2-DH3 NumberofPulsesin31.6seconds π/4DQPSK_2-DH3 ReportNo.:MTEB24020084-R Page53of56 PulseWidth π/4DQPSK_2-DH5 NumberofPulsesin31.6seconds π/4DQPSK_2-DH5 PulseWidth 8DPSK_3-DH1 NumberofPulsesin31.6seconds 8DPSK_3-DH1 PulseWidth 8DPSK_3-DH3 NumberofPulsesin31.6seconds 8DPSK_3-DH3 ReportNo.:MTEB24020084-R Page54of56 PulseWidth 8DPSK_3-DH5 NumberofPulsesin31.6seconds 8DPSK_3-DH5 ReportNo.:MTEB24020084-R Page55of56 APPENDIXVIII.NumberOfHoppingChannel TestResult ModulationPacket NumberofHopping Channel LimitResult GFSKDH57915PASS GFSKDH57915PASS GFSKDH57915PASS π/4DQPSK2-DH57915PASS π/4DQPSK2-DH57915PASS π/4DQPSK2-DH57915PASS 8DPSK3-DH57915PASS 8DPSK3-DH57915PASS 8DPSK3-DH57915PASS TestGraphs HoppingPlot GFSK HoppingPlot GFSK HoppingPlot GFSK HoppingPlot π/4DQPSK ReportNo.:MTEB24020084-R Page56of56 HoppingPlot π/4DQPSK HoppingPlot π/4DQPSK HoppingPlot 8DPSK HoppingPlot 8DPSK Void HoppingPlot 8DPSK **********************EndofReport**********************

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Model No.: Nexa 1 CE TEST SETUP RE TEST SETUP Model No.: Nexa 1 RE TEST SETUP