2AUEW-ZH700WIRELESS HEADPHONES

FCCCaution Thisdevicecomplieswithpart15oftheFCCRules.Operationissubjecttothe followingtwoconditions:(1)Thisdevicemaynotcauseharmfulinterference,and(2) thisdevicemustacceptanyinterferencereceived,includinginterferencethatmay cause undesired operation. AnyChangesormodificationsnotexpresslyapprovedbythepartyresponsiblefor compliancecould voidthe user'sauthorityto operatetheequipment. Note:ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClass Bdigitaldevice,pursuanttopart15oftheFCCRules.Theselimitsaredesignedto providereasonableprotectionagainstharmfulinterferenceinaresidentialinstallation. Thisequipmentgeneratesusesandcanradiateradiofrequencyenergyand,ifnot installedandusedinaccordancewiththeinstructions,maycauseharmfulinterference toradiocommunications.However,thereisnoguaranteethatinterferencewillnot occurinaparticularinstallation.Ifthisequipmentdoescauseharmfulinterferenceto radioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoff andon,theuserisencouragedtotrytocorrecttheinterferencebyoneormoreofthe followingmeasures: -Reorient orrelocatethereceivingantenna. -Increasethe separationbetweentheequipmentandreceiver. -Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthe receiverisconnected. -Consultthe dealer oranexperiencedradio/TVtechnicianfor help. The devicehas beenevaluatedtomeetgeneralRFexposurerequirement.The device can be usedin portableexposureconditionwithoutrestriction.

Rev11/20/07 (ShenzhenYikexinNetworkTechnologyCo.,Ltd.) FederalCommunicationsCommission AuthorizationandEvaluationDivision ConfidentialityRequestregardingapplicationforcertificationofFCCID:2AUEW-ZH700 PursuanttoSections0.457and0.459oftheCommission’sRules,weherebyrequestconfidential treatmentofinformationaccompanyingthisapplicationasoutlinedbelow: ExhibitTypeFileName BlockDiagram, Schematics, OperationalDescription BlockDiagram Schematics OperationalDescription Theabovematerialscontaintradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthesematerialsmaybeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors. TheapplicantunderstandsthatpursuanttoSection0.457oftheRules,disclosureofthis applicationandallaccompanyingdocumentationwillnotbemadebeforethedateoftheGrant forthisapplication. Sincerely, (ShaojunLi)

(ShenzhenYikexinNetworkTechnologyCo.,Ltd.) FederalCommunicationsCommission AuthorizationandEvaluationDivision 1435OaklandMillsRoad Columbia,MD21046 Date:2021.3.11 SUBJECT:FCCApplicationforFCCID:2AUEW-ZH700 ToWhomItMayConcern: We,theundersigned,herebyauthorizeAlanMeiatShenzhenBCTCTestingCo.,Ltd.on ourbehalf,toapplytotheFederalCommunicationsCommissiononourequipment.Any andallactscarriedoutbyAlanMeiofShenzhenBCTCTestingCo.,Ltd.onourbehalf shallhavethesameeffectasactsofourown. ThisistoadvisethatweareinfullcompliancewiththeAnti-DrugAbuseAct.We,the applicant,arenotsubjecttoadenialoffederalbenefitspursuanttoSection5301ofthe Anti-DrugActof1988,21USC853a,andnopartytotheapplicationissubjecttoadenial offederalbenefitspursuanttothatsection. Regards, (ShaojunLi)

ExternalPhotos

Label&labellocation WIRELESSHEADPHONES FCCID:2AUEW-ZH700

InternalPhotos Antenna

RFEXPOSUREEVALUATIONMETHOD FCCID:2AUEW-ZH700 SARTestExclusionThresholdsfor100MHz – 6GHzand ≤ 50mm ApproximateSARTestExclusionPowerThresholdsatSelectedFrequenciesandTestSeparation DistancesareillustratedinthefollowingTable. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances ≤ 50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)] · [ √ f(GHz)] ≤ 3.0for1-gSARand ≤ 7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis ≤ 50 mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtest exclusion. BT-EDR maxpossibleoutputpower(PK,conducted)：3±1dbm 3dBilogarithmictermsconverttonumericresultisnearly1.995 4dbm=2.51mW 2402MHz [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)]2.51/5*√2.402=0.78≤3.0 ThresholdatwhichnoSARrequiredis10mwand≤3.0for1-gSAR,Separation distanceis5mm. Modulation Frequency (MHz) OutputPower (dBm) MaxAntenna Gain(dBi) GFSK2402-0.800 1.2 GFSK 24410.163 1.2 GFSK 24800.830 1.2 Pi/4DQPSK 24020.320 1.2 Pi/4DQPSK 24411.051 1.2 Pi/4DQPSK 24801.624 1.2 8DPSK8DPSK 0.831 1.2 8DPSK8DPSK 1.334 1.2 8DPSK8DPSK2.407 1.2 2441MHz [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)]=2.51/5*√2.441=0.78≤3.0 ThresholdatwhichnoSARrequiredis10mwand≤3.0for1-gSAR,Separation distanceis5mm. Conclusion:NoSARisrequired. 2480MHz [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)]=2.51/5*√2.48=0.79≤3.0 ThresholdatwhichnoSARrequiredis10mwand≤3.0for1-gSAR,Separation distanceis5mm.

No.：BCTC/RF-EMC-007Page: 1 of 68 Edition：A.3 TESTREPORT ShenzhenBCTCTestingCo.,Ltd. ReportNo.:BCTC2101493724E Applicant:ShenzhenYikexinNetworkTechnologyCo.,Ltd. ProductName:WIRELESSHEADPHONES Model/Type reference: ZH700 TestedDate:2021-01-07to2021-01-18 IssuedDate:2021-01-18 ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 2 of 68 Edition：A.3 FCCID:2AUEW-ZH700 Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp.Thisresult(s)showninthisreport referonlytothesample(s)tested.WithoutwrittenapprovalofShenzhenBCTCTestingCo.,Ltd,thisreport can’tbereproducedexceptinfull.Thetestedsample(s)andthesampleinformationareprovidedbythe client. ProductName: WIRELESSHEADPHONES Trademark:Zamkol Model/Typereference:ZH700 PreparedFor:ShenzhenYikexinNetworkTechnologyCo.,Ltd. Address: Building604,Building28,Anjinheng,SongheCommuntiy, LonghuaStreet,LonghuaDistrictt,Shenzhen,China Manufacturer:DongguanTopstarElectronicsTechnologyCo.,Ltd Address: Room303,Builing5,No.2,HuangdongJintianRoad, FenggangTown,DongguanCity,GuangdongProvince, China PreparedBy:ShenzhenBCTCTestingCo.,Ltd. Address: 1-2/F.,BuildingB,PengzhouIndustrialPark,No.158,Fuyuan 1stRoad,Tangwei,FuhaiSubdistrict,Bao'anDistrict, Shenzhen,Guangdong,China SampleReceivedDate:2021-01-07 SampletestedDate:2021-01-07to2021-01-18 IssueDate:2021-01-18 ReportNo.:BCTC2101493724E TestStandards FCCPart15.247 ANSIC63.10-2013 TestResultsPASS Remark:Thisis BluetoothClassic radiotestreport. Testedby:Approvedby: KelseyTan/ProjectHandlerZeroZhou/Reviewer ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 3 of 68 Edition：A.3 TABLEOFCONTENT TestReportDeclarationPage 1.VERSION ........................................................................................................................ 5 2.TESTSUMMARY .......................................................................................................... 6 3.MEASUREMENTUNCERTAINTY ............................................................................. 7 4.PRODUCTINFORMATIONANDTESTSETUP ..................................................... 8 4.1ProductInformation .................................................................................................. 8 4.2TestSetupConfiguration ......................................................................................... 8 4.3SupportEquipment ................................................................................................... 9 4.4ChannelList ............................................................................................................... 9 4.5TestMode ................................................................................................................ 10 4.6tableofparametersoftextsoftwaresetting ....................................................... 10 5.TESTFACILITYANDTESTINSTRUMENTUSED .............................................. 11 5.1TestFacility .............................................................................................................. 11 5.2TestInstrumentUsed ............................................................................................. 11 6.CONDUCTEDEMISSIONS ....................................................................................... 13 6.1BlockDiagramOfTestSetup ............................................................................... 13 6.2Limit ........................................................................................................................... 13 6.3Testprocedure ........................................................................................................ 13 6.4EUToperatingConditions ..................................................................................... 13 6.5TestResult ............................................................................................................... 14 7.RADIATEDEMISSIONS ............................................................................................ 16 7.1BlockDiagramOfTestSetup ............................................................................... 16 7.2Limit ........................................................................................................................... 17 7.3Testprocedure ........................................................................................................ 18 7.4EUToperatingConditions ..................................................................................... 19 7.5TestResult ............................................................................................................... 20 8.RADIATEDBANDEMISSIONMEASUREMENTANDRESTRICTEDBANDS OFOPERATION .............................................................................................................. 24 8.1BlockDiagramOfTestSetup ............................................................................... 24 8.2Limit ........................................................................................................................... 24 8.3Testprocedure ........................................................................................................ 25 8.4EUToperatingConditions ..................................................................................... 25 8.5TestResult ............................................................................................................... 26 9.CONDUCTEDEMISSION .......................................................................................... 27 9.1BlockDiagramOfTestSetup ............................................................................... 27 9.2Limit ........................................................................................................................... 27 9.3Testprocedure ........................................................................................................ 27 9.4TestResult ............................................................................................................... 28 10.20DBBAN…

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ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 39 of 68 Edition：A.3 GFSKMiddleChannel GFSKHighChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 40 of 68 Edition：A.3 Pi/4DQPSKLowChannel Pi/4DQPSKMiddleChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 41 of 68 Edition：A.3 Pi/4DQPSKHighChannel 8DPSKLowChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 42 of 68 Edition：A.3 8DPSKMiddleChannel 8DPSKHighChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 43 of 68 Edition：A.3 11.MAXIMUMPEAKOUTPUTPOWER 11.1BlockDiagramOfTestSetup 11.2Limit FCCPart15(15.247),SubpartC SectionTestItemLimit FrequencyRange (MHz) Result 15.247(b)(1) PeakOutput Power 0.125wattor 21dBm 2400-2483.5PASS 11.3Testprocedure 1.RemovetheantennafromtheEUTandthenconnectalowRFcablefromtheantenna porttothespectrum. 2.Setthespectrumanalyzer:RBW=3MHz.VBW=3MHz.Sweep=auto;Detector Function=Peak. 3.KeeptheEUTintransmittingatlowest,mediumandhighestchannelindividually. Recordthemaxvalue. ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 44 of 68 Edition：A.3 11.4TestResult Temperature： 26 °C Relative Humidity： 54% TestVoltage：DC3.7VRemark:N/A ModulationTestChannelOutputPower(dBm)Limit(dBm) GFSKLow-0.80021 GFSK Middle0.16321 GFSK High0.83021 Pi/4DQPSK Low0.32021 Pi/4DQPSK Middle1.05121 Pi/4DQPSK High1.62421 8DPSK Low0.83121 8DPSK Middle1.33421 8DPSKHigh2.40721 Testplots GFSKLowChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 45 of 68 Edition：A.3 GFSKMiddleChannel GFSKHighChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 46 of 68 Edition：A.3 Pi/4DQPSKLowChannel Pi/4DQPSKMiddleChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 47 of 68 Edition：A.3 Pi/4DQPSKHighChannel 8DPSKLowChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 48 of 68 Edition：A.3 8DPSKMiddleChannel 8DPSKHighChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 49 of 68 Edition：A.3 12.HOPPINGCHANNELSEPARATION 12.1BlockDiagramOfTestSetup 12.2Limit Frequencyhoppingsystemsshallhavehoppingchannelcarrierfrequenciesseparated byaminimumof25kHzorthe20dBbandwidthofthehoppingchannel,whicheveris greater.Alternatively,frequencyhoppingsystemsoperatinginthe2400-2483.5MHz bandmayhavehoppingchannelcarrierfrequenciesthatareseparatedby25kHzor two-thirdsofthe20dBbandwidthofthehoppingchannel,whicheverisgreater,provided thesystemsoperatewithanoutputpowernogreaterthan0.125W. 12.3Testprocedure 1.RemovetheantennafromtheEUTandthenconnectalowRFcablefromtheantenna port tothespectrum. 2.Setthespectrumanalyzer:RBW=30kHz.VBW=100kHz,Span=2.0MHz.Sweep= auto;DetectorFunction=Peak.Trace=Maxhold. 3.Allowthetracetostabilize.Usethemarker-deltafunctiontodeterminetheseparation betweenthepeaksoftheadjacentchannels.Thelimitisspecifiedinoneofthe subparagraphsofthisSectionSubmitthisplot. ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 50 of 68 Edition：A.3 12.4TestResult ModulationTestChannel Separation (MHz) Limit(MHz)Result GFSKLow0.9980.578PASS GFSKMiddle0.9960.567PASS GFSKHigh1.0040.574PASS Pi/4DQPSKLow0.9900.813PASS Pi/4DQPSKMiddle1.0040.820PASS Pi/4DQPSKHigh1.0000.814PASS 8DPSKLow1.0060.804PASS 8DPSKMiddle0.9980.806PASS 8DPSKHigh0.9940.803PASS Testplots GFSKLowChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 51 of 68 Edition：A.3 GFSKMiddleChannel GFSKHighChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 52 of 68 Edition：A.3 Pi/4DQPSKLowChannel Pi/4DQPSKMiddleChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 53 of 68 Edition：A.3 Pi/4DQPSKHighChannel 8DPSKLowChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 54 of 68 Edition：A.3 8DPSKMiddleChannel 8DPSKHighChannel ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 55 of 68 Edition：A.3 13.NUMBEROFHOPPINGFREQUENCY 13.1BlockDiagramOfTestSetup 13.2Limit Frequencyhoppingsystemsinthe2400-2483.5MHzbandshalluseatleast15 channels. 13.3Testprocedure 1.RemovetheantennafromtheEUTandthenconnectalowRFcablefromtheantenna porttothespectrum. 2.Setthespectrumanalyzer:RBW=100kHz.VBW=300kHz.Sweep=auto;Detector Function=Peak.Trace=Maxhold. 3.Allowthetracetostabilize.Itmayprovenecessarytobreakthespanuptosections.in ordertoclearlyshowallofthehoppingfrequencies.Thelimitisspecifiedinoneofthe subparagraphsofthisSection. 4.Setthespectrumanalyzer:StartFrequency=2.4GHz,StopFrequency=2.4835GHz. Sweep=auto; ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 56 of 68 Edition：A.3 13.4TestResult TestPlots: 79Channelsintotal GFSK Pi/4DQPSK ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 57 of 68 Edition：A.3 8DPSK ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 58 of 68 Edition：A.3 14.DWELLTIME 14.1BlockDiagramOfTestSetup 14.2Limit Frequencyhoppingsystemsinthe2400-2483.5MHzbandshalluseatleast15channels. Theaveragetimeofoccupancyonanychannelshallnotbegreaterthan0.4seconds withinaperiodof0.4secondsmultipliedbythenumberofhoppingchannelsemployed. Frequencyhoppingsystemsmayavoidorsuppresstransmissionsonaparticular hoppingfrequencyprovidedthataminimumof15channelsareused. 14.3Testprocedure 1.RemovetheantennafromtheEUTandthenconnectalowRFcablefromtheantenna porttothespectrum. 2.Setspectrumanalyzerspan=0.Centredonahoppingchannel; 3.SetRBW=1MHzandVBW=3MHz.Sweep=asnecessarytocapturetheentiredwell timeperhoppingchannel.SettheEUTforDH5,DH3andDH1packettransmitting. 4.Usethemarker-deltafunctiontodeterminethedwelltime.Ifthisvaluevarieswith differentmodesofoperation(e.g..datarate.modulationformat.etc.).repeatthistestfor eachvariation.ThelimitisspecifiedinoneofthesubparagraphsofthisSection.Submit thisplot(s). ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 59 of 68 Edition：A.3 14.4TestResult DH5Packetpermitmaximum1600/79/6hopspersecondineachchannel (5timeslotsRX,1timeslotTX). DH3Packetpermitmaximum1600/79/4hopspersecondineachchannel (3timeslotsRX,1timeslotTX). DH1Packetpermitmaximum1600/79/2hopspersecondineachchannel (1timeslotRX,1timeslotTX).So,theDwellTimecanbecalculatedasfollows: DH5:1600/79/6*0.4*79*(MkrDelta)/1000 DH3:1600/79/4*0.4*79*(MkrDelta)/1000 DH1:1600/79/2*0.4*79*(MkrDelta)/1000 Rem…

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ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 65 of 68 Edition：A.3 16.EUTPHOTOGRAPHS EUTPhoto1 EUTPhoto2 ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 66 of 68 Edition：A.3 17.EUTTESTSETUPPHOTOGRAPHS ConductedemissionsPhotos RadiatedMeasurementPhotos ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 67 of 68 Edition：A.3 ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 68 of 68 Edition：A.3 STATEMENT 1.Theequipmentlistsaretraceabletothenationalreferencestandards. 2.Thetestreportcannotbepartiallycopiedunlesspriorwrittenapprovalisissuedfromour lab. 3.Thetestreportisinvalidwithoutstampoflaboratory. 4.Thetestreportisinvalidwithoutsignatureofperson(s)testingandauthorizing. 5.ThetestprocessandtestresultisonlyrelatedtotheUnitUnderTest. 6.ThequalitysystemofourlaboratoryisinaccordancewithISO/IEC17025. 7.Ifthereisanyobjectiontoreport,theclientshouldinformissuinglaboratorywithin15 daysfromthedateofreceivingtestreport. Address: 1-2/F.,BuildingB,PengzhouIndustrialPark,No.158,Fuyuan1stRoad,Tangwei,Fuhai Subdistrict,Bao'anDistrict,Shenzhen,Guangdong,China TEL：400-788-9558 P.C.:518103 FAX：0755-33229357 Website：http://www.bctc-lab.com E-Mail：[email protected] ※※※※※END※※※※※

ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 66 of 68 Edition：A.3 17.EUTTESTSETUPPHOTOGRAPHS ConductedemissionsPhotos RadiatedMeasurementPhotos ReportNo.:BCTC2101493724E No.：BCTC/RF-EMC-007Page: 67 of 68 Edition：A.3