2BK6K-J20Wireless Earphone

ModelJ20 FCC Caution: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: 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 this equipment 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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

2.911(d)(5)(i)EquipmentTypeAttestationv1.2 DongguanQingzhuElectronicTechnologyCo.,Ltd Section2.911(d)(5)(i)Certification–EquipmentType Companyname:DongguanQingzhuElectronicTechnologyCo.,Ltd Address:Room302,Building1,No.16IndustrialRoad,TangxiaTown,Dongguan City,GuangdongProvince,China ProductName:WirelessEarphone FCCID:2BK6K-J20 Model(s):J20,J50 2.911(d)(5)(i)EquipmentType We,[DongguanQingzhuElectronicTechnologyCo.,Ltd]certifythattheequipmentforwhich authorizationissoughtthroughcertificationisnot: Prohibitedfromreceivinganequipmentauthorizationpursuantto§2.903;oftheFCCrules. Identifiedasanequipmenttypeinthe“CoveredList” NOTE1 Yourssincerely, Name:ChaoXiongDate:09-28-2024 TitleandCompanyname:generalmanager/DongguanQingzhuElectronicTechnology Co.,Ltd NOTE1 “CoveredList”;istheListofEquipmentandServicesCoveredBySection2ofTheSecureNetworksAct,availableat https://www.fcc.gov/supplychain/coveredlist References; 1)986446D01CoveredEquipmentv01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2)FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

2.911(d)(5)(ii)ApplicantAttestationv1.3 DongguanQingzhuElectronicTechnologyCo.,Ltd Section2.911(d)(5)(ii)Certification–Applicant(CoveredList) Companyname:DongguanQingzhuElectronicTechnologyCo.,Ltd Address:Room302,Building1,No.16IndustrialRoad,TangxiaTown,Dongguan City,GuangdongProvince,China ProductName:WirelessEarphone FCCID:2BK6K-J20 Model(s):J20,J50 2.911(d)(5)(ii)Applicantfiling We,[DongguanQingzhuElectronicTechnologyCo.,Ltd]certifythat,asofthedateofthefilingof theapplication,theapplicantisnotidentified NOTE1 onthe“CoveredList” NOTE2 ,established pursuantto§1.50002ofthischapter,asanentityproducingcoveredcommunicationsequipment. Yourssincerely, Name:ChaoXiongDate:09-28-2024 TitleandCompanyname:generalmanager/DongguanQingzhuElectronicTechnology Co.,Ltd NOTE1 Deleteoptionnotapplicabletothisapplication. NOTE2 “CoveredList”;istheListofEquipmentandServicesCoveredBySection2ofTheSecureNetworksAct,availableat https://www.fcc.gov/supplychain/coveredlist References; 1)986446D01CoveredEquipmentv01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2)FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

DongguanQingzhuElectronicTechnologyCo.,Ltd U.S.AgentLetterofAttestation To:FederalCommunicationsCommission 7435OaklandMillsRoad,Columbia,MD21046,USA Date:09-28-2024 Ref: AttestationStatement–Part 2.911(d)(7)filing Address: 1200BroadwaySt.APT329,LosAngeles,CA90015 FCCID:2BK6K-J20DongguanQingzhuElectronicTechnologyCo.,Ltdcertifiesthat,asofthe dateofthefilingoftheapplication,THREESTONESMEDIALLCisourdesignatedU.S.agentfor serviceofprocessfortheabovereferenceFCCID.Theapplicantacceptstomaintainanagentfor serviceofprocessintheUnitedStatesfornolessthanoneyearaftereitherthegranteehas permanentlyterminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S., ortheconclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolvingthe equipment,whicheverislater.Theapplicantfurtheracknowledgesitisourresponsibilitytoinform theFCCwhenevertheagentinformationchanges. THREESTONESMEDIALLCunderstanditistheagent'sobligationtoacceptserviceofprocessin theUnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S.address andemailaddress. DesignatedU.S.Agent CompanyName: THREESTONESMEDIALLC FRN:0033401761 GC:2A99E ContactPerson:SijieZhang Tel:+12679093692Email:[email protected] Signature: m Applicant CompanyName:DongguanQingzhuElectronicTechnologyCo.,Ltd Address: Room302,Building1,No.16IndustrialRoad,Tangxia Town,DongguanCity,GuangdongProvince,China Signature: ContactPerson:ChaoXiong FRN:0035964535 GC:2BK6K Email:[email protected]

DongguanQingzhuElectronicTechnologyCo.,Ltd OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:09-28-2024 Subject;RequestforConfidentiality FCCID:2BK6K-J20 ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthesedocuments mightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantageinthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:ChaoXiong Title:generalmanager

DongguanQingzhuElectronicTechnologyCo.,Ltd LetterofAuthorization Company:DongguanQingzhuElectronicTechnologyCo.,Ltd Address:Room302,Building1,No.16IndustrialRoad,TangxiaTown,Dongguan City,GuangdongProvince,China ProductName:WirelessEarphone ModelNumber(s):J20,J50 ProductDescription:WirelessEarphone WeauthorizeMiCOMLabsInc.,575BoulderCourt,Pleasanton,California94566,USA, toactonourbehalfonallmattersconcerningthecertificationofabovenamed equipment. WedeclarethatMiCOMLabsInc.isallowedtoforwardallinformationrelatedtothe approvalandcertificationofequipmenttotheregulatoryagenciesasrequiredandto discussanyissuesconcerningtheapprovalapplication.Anyandallactscarriedoutby MiCOMLabsonourbehalfshallhavethesameeffectasactsofourown. Signature:Date:09-28-2024 Name:ChaoXiong Title:generalmanager Company:DongguanQingzhuElectronicTechnologyCo.,Ltd

version01 DongguanQingzhuElectronicTechnologyCo.,Ltd Modeldifferencestatement Itisherebydeclaredthattheproduct FCCID:2BK6K-J20 ProductName:WirelessEarphone Model(s):J20,J50 Mark:/ AllmodelshavethesamecircuitandRFmodule,Onlydifferentcolor. Sincerely, Signature [ChaoXiong] [generalmanager] [DongguanQingzhuElectronicTechnologyCo.,Ltd]

FCCID:2BK6K-J20 FCCID:2BK6K-J20 FCCID:2BK6K-J20 FCCID:2BK6K-J20

FCCID:2BK6K-J20 Label Size:10mm*8mm FCCID:2BK6K-J20 LabelLocation

FCCID:2BK6K-J20 FCCID:2BK6K-J20 FCCID:2BK6K-J20 FCCID:2BK6K-J20 ANT FCCID:2BK6K-J20

RFExposureevaluation FCCID2BK6K-J20 ProductNameWirelessEarphone ModelNo.J20 ListedModel(s)J50 ExposurecategoryGeneralpopulation/uncontrolledenvironment EUTTypeProductionUnit DeviceTypePortableDevice 1.Reference ANSIC95.1–1999:IEEEStandardforSafetyLevelswithRespecttoHumanExposureto RadioFrequencyElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortable DevicesRFExposureProceduresandEquipmentAuthorizationPolicies. FCCCFR47part11.1310:Radiofrequencyradiationexposurelimits. FCCCFR47part22.1093:Radiofrequencyradiationexposureevaluation:portabledevices 2.Requirement AccordingtoKDB447498D01GeneralRFExposureGuidancev06Section4.3.1Standalone SARtestexclusionconsiderations:“UnlessspecificallyrequiredbythepublishedRFexposure KDBprocedures,standalone1-gheadorbodyand10-gextremitySARevaluationforgeneral populationexposureconditions,bymeasurementornumericalsimulation,isnotrequired whenthecorrespondingSARTestExclusionThresholdcondition,listedbelow,issatisfied. Thesetestexclusionconditionsarebasedonsource-basedtime-averagedmaximum conductedoutputpoweroftheRFchannelrequiringevaluation,adjustedfortune-uptolerance, andtheminimumtestseparationdistancerequiredfortheexposureconditions.22The minimumtestseparationdistanceisdeterminedbythesmallestdistancefromtheantenna andradiatingstructuresoroutersurfaceofthedevice,accordingtothehostformfactor, exposureconditionsandplatformrequirements,toanypartofthebodyorextremityofauser orbystander(see5)ofsection4.1).ToqualifyforSARtestexclusion,thetestseparation distancesappliedmustbefullyexplainedandjustifiedbytheoperatingconfigurationsand exposureconditionsofthetransmitterandapplicablehostplatformrequirements,typicallyin theSARmeasurementorSARanalysisreport,accordingtotherequiredpublishedRF exposureKDBprocedures.WhennootherRFexposuretestingorreportingisrequired,a statementofjustificationandcompliancemustbeincludedintheequipmentapproval,inlieuof theSARreport,toqualifyfortheSARtestexclusion.Whenrequired,thedevicespecific conditionsdescribedintheotherpublishedRFexposureKDBproceduresmustbesatisfied beforeapplyingtheseSARtestexclusionprovisions;forexample,handheldPTTtwo-way radios,handsets,laptops&tabletsetc.23” [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f(GHz)]≤3.0for1-gSARand≤7.5for10-gextremitySAR,where: •f(GHz)istheRFchanneltransmitfrequencyinGHz •PoweranddistanceareroundedtothenearestmWandmmbeforecalculation •Theresultisroundedtoonedecimalplaceforcomparison •3.0and7.5arereferredtoasthenumericthresholdsinthestep2below Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mm andfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmaccordingto5)insection4.1isappliedto determineSARtestexclusion. Whenoneofthefollowingtestexclusionconditionsissatisfiedforallcombinationsof simultaneoustransmissionconfigurations,furtherequipmentapprovalisnotrequiredto incorporatetransmittermodulesinhostdevicesthatoperateinthemixedmobileandportable hostplatformexposureconditions.Thegranteeisresponsiblefordocumentingthisaccording toClassIpermissivechangerequirements.AntennasthatqualifyforstandaloneSARtest exclusionmustapplytheestimatedstandaloneSARtodeterminesimultaneoustransmission testexclusion. a)The[∑of(thehighestmeasuredorestimatedSARforeachstandaloneantenna configuration,adjustedformaximumtune-uptolerance)/1.6W/kg]+[∑ofMPEratios]is≤ 1.0. b)TheSARtopeaklocationseparationratiosofallsimultaneouslytransmittingantennapairs operatinginportabledeviceexposureconditionsareall≤0.04,andthe[∑ofMPEratios]is≤ 1.0. 3.ConductedPeakOutputPower Right: ModulationPacketTypeChannel PeakOutput Power (dBm) PeakOutput Power (mW) GFSKDH5 02.481.77 390.881.22 780.361.09 π/4DQPSK2-DH5 03.452.21 390.581.14 782.211.66 8DPSK3-DH5 00.201.05 392.591.82 782.251.68 Left: ModulationPacketTypeChannel PeakOutput Power (dBm) PeakOutput Power (mW) GFSKDH5 01.961.57 392.081.61 781.631.45 π/4DQPSK2-DH5 02.341.71 392.491.78 782.121.63 8DPSK3-DH5 02.461.76 392.591.82 782.261.68 4.ManufacturingTolerance Right: BR/EDR DH5 ChannelChannel0Channel39Channel78 Target(dBm)200 Tolerance±(dB)1.01.01.0 2DH5 ChannelChannel0Channel39Channel78 Target(dBm)302 Tolerance±(dB)1.01.01.0 3DH5 ChannelChannel0Channel39Channel78 Target(dBm)022 Tolerance±(dB)1.01.01.0 Left: BR/EDR DH5 ChannelChannel0Channel39Channel78 Target(dBm)121 Tolerance±(dB)1.01.01.0 2DH5 ChannelChannel0Channel39Channel78 Target(dBm)222 Tolerance±(dB)1.01.01.0 3DH5 ChannelChannel0Channel39Channel78 Target(dBm)222 Tolerance±(dB)1.01.01.0 5.EvaluationResult Band/Modef(GHz) Antenna Distance (mm) RFoutputpower SARTest Exclusion Threshold SARTest Exclusion dBmmW BR/EDR2.40254 2.51 0.7786<3.0Yes Remark: 1.Outputpowerincludingtuneuptolerance; 2.Whentheminimumtestseparationdistanceis<5mm,adistanceof5mmaccordingtof)in section4.1isappliedtodetermineSARtestexclusion. 6.Conclusion ThemeasurementresultscomplywiththeFCCLimitper47CFR2.1093fortheuncontrolled RFExposureandSARExclusionThresholdperKDB447498D01V06. ------Endofthereport------

Quick Reference Da Productspecification te Antenna module on the system board Frequenc Range 2400 ~ 2500MHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -1.2 (Input pwr – loss pwr) Peak EIRP(dBm) 1.7 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) 6 0.2 % Gain (dBi) 1.9 (Peak Gain XZ-plane) 1.7 (XZMaximumPower (dBm)-plane) Minimum Power (dBm) -4(XZ-plane) Avg. Power (dBm) -0.5(XY-plane) Input Impendence(ohm) 50 Polarization Type V ertical & Horizontal V . S .W . R < 1.4 All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Gain Table Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane Efficiency Peak Avg. APeakvg. Peak Avg. Module Board 1.2 -0.51.9 -3.61.1 -3.06 0.2 % Room 302,Building 1,No.16 Industrial Road, Tangxia Town,Dongguan City,Guangdong Province,Dongguan,China Dongguan Qingzhu Electronic Technology Co., Ltd ModelJ20 Retum Loss The Environment of Antenna Radiation Pattem 3D radiation pattern diagram XY-plane XZ-plane YZ-plane

ReportNo.:CISRR240910076 -1- AppendixA ReportNo.: CISRR240910076 FCCID: 2BK6K-J20 ProductName: WirelessEarphone ModelNo.:J20 TestEngineer:JimmyHuang Supervisedby:RoryHuang ReportNo.:CISRR240910076 -2- 1)DutyCycle Right: TestResult ModulationPacketsChannel OnTime (ms) Period(ms) DutyCycle (%) DutyCycle (linear) DutyCycle Factor(dB) 1/T GFSKDH5 02.9063.74877.530.77531.10530.34 392.9063.74877.530.77531.10530.34 782.9063.74877.530.77531.1053 0.34 π/4DQPSK2-DH5 02.9123.74877.690.77691.0963 0.34 392.9123.74877.690.77691.0963 0.34 782.9123.74877.690.77691.09630.34 8DPSK3-DH5 02.9143.74877.750.77751.0930.34 392.9143.74877.750.77751.0930.34 782.9143.74877.750.77751.093 0.34 TestGraphs GFSK(DH5)_Channel0 ReportNo.:CISRR240910076 -3- GFSK(DH5)_Channel39 GFSK(DH5)_Channel78 ReportNo.:CISRR240910076 -4- π/4DQPSK(2-DH5)_Channel0 π/4DQPSK(2-DH5)_Channel39 ReportNo.:CISRR240910076 -5- π/4DQPSK(2-DH5)_Channel78 8DPSK(3-DH5)_Channel0 ReportNo.:CISRR240910076 -6- 8DPSK(3-DH5)_Channel39 8DPSK(3-DH5)_Channel78 ReportNo.:CISRR240910076 -7- Left: TestResult ModulationPacketsChannel OnTime (ms) Period(ms) DutyCycle (%) DutyCycle (linear) DutyCycle Factor(dB) 1/T GFSKDH5 02.8863.74877.000.77001.13510.35 392.8863.74877.000.77001.13510.35 782.8863.74877.000.77001.1351 0.35 π/4DQPSK2-DH5 02.8923.74877.160.77161.1261 0.35 392.8903.74877.110.77111.1289 0.35 782.8923.74877.160.77161.12610.35 8DPSK3-DH5 02.8943.74877.210.77211.12330.35 392.8923.74877.160.77161.12610.35 782.8923.74877.160.77161.1261 0.35 TestGraphs GFSK(DH5)_Channel0 ReportNo.:CISRR240910076 -8- GFSK(DH5)_Channel39 GFSK(DH5)_Channel78 ReportNo.:CISRR240910076 -9- π/4DQPSK(2-DH5)_Channel0 π/4DQPSK(2-DH5)_Channel39 ReportNo.:CISRR240910076 -10- π/4DQPSK(2-DH5)_Channel78 8DPSK(3-DH5)_Channel0 ReportNo.:CISRR240910076 -11- 8DPSK(3-DH5)_Channel39 8DPSK(3-DH5)_Channel78 ReportNo.:CISRR240910076 -12- 2)DwellTime Right: TestResult ModulationPacketChannel PulseWidth (ms) Numberof Pulsesin31.6 seconds DwellTime (ms) Limit(ms)Result GFSKDH5 CH0 (2402MHz) 2.912110320.32 <400 PASS π/4DQPSK2-DH52.912109317.41PASS 8DPSK3-DH52.912101294.11PASS TestGraphs PulseWidth GFSK_DH5 NumberofPulsesin31.6seconds GFSK_DH5 PulseWidth π/4DQPSK_2-DH5 NumberofPulsesin31.6seconds π/4DQPSK_2-DH5 ReportNo.:CISRR240910076 -13- PulseWidth 8DPSK_3-DH5 NumberofPulsesin31.6seconds 8DPSK_3-DH5 Left: TestResult ModulationPacketChannel PulseWidth (ms) Numberof Pulsesin31.6 seconds DwellTime (ms) Limit(ms)Result GFSKDH5 CH0 (2402MHz) 2.88899285.91 <400 PASS π/4DQPSK2-DH52.896118341.73PASS 8DPSK3-DH52.896116335.94PASS TestGraphs PulseWidth GFSK_DH5 NumberofPulsesin31.6seconds GFSK_DH5 ReportNo.:CISRR240910076 -14- PulseWidth π/4DQPSK_2-DH5 NumberofPulsesin31.6seconds π/4DQPSK_2-DH5 PulseWidth 8DPSK_3-DH5 NumberofPulsesin31.6seconds 8DPSK_3-DH5 ReportNo.:CISRR240910076 -15- 3)NumberOfHoppingChannel Right: TestResult ModulationPacket NumberofHopping Channel LimitResult GFSKDH57915PASS π/4DQPSK2-DH57915PASS 8DPSK3-DH57915PASS TestGraphs LowEndSpectrumChannelHoppingPlot GFSK HighEndSpectrumChannelHoppingPlot GFSK LowEndSpectrumChannelHoppingPlot π/4DQPSK HighEndSpectrumChannelHoppingPlot π/4DQPSK ReportNo.:CISRR240910076 -16- LowEndSpectrumChannelHoppingPlot 8DPSK HighEndSpectrumChannelHoppingPlot 8DPSK Left: TestResult ModulationPacket NumberofHopping Channel LimitResult GFSKDH57915PASS π/4DQPSK2-DH57915PASS 8DPSK3-DH57915PASS TestGraphs LowEndSpectrumChannelHoppingPlot GFSK HighEndSpectrumChannelHoppingPlot GFSK ReportNo.:CISRR240910076 -17- LowEndSpectrumChannelHoppingPlot π/4DQPSK HighEndSpectrumChannelHoppingPlot π/4DQPSK LowEndSpectrumChannelHoppingPlot 8DPSK HighEndSpectrumChannelHoppingPlot 8DPSK ReportNo.:CISRR240910076 -18- 4)ConductedPeakOutputPower Right: TestResult ModulationPacketTypeChannel PeakOutput Power (dBm) PeakOutput Power (mW) Limit (dBm) Result GFSKDH5 02.481.77 ≤30 PASS 390.881.22PASS 780.361.09PASS π/4DQPSK2-DH5 03.452.21 ≤20.97 PASS 390.581.14PASS 782.211.66PASS 8DPSK3-DH5 00.201.05PASS 392.591.82PASS 782.251.68PASS TestGraphs PeakOutputPower GFSK_Channel0 PeakOutputPower GFSK_Channel39 PeakOutputPowerPeakOutputPower ReportNo.:CISRR240910076 -19- GFSK_Channel78π/4DQPSK_Channel0 PeakOutputPower π/4DQPSK_Channel39 PeakOutputPower π/4DQPSK_Channel78 PeakOutputPower 8DPSK_Channel0 PeakOutputPower 8DPSK_Channel39 PeakOutputPower 8DPSK_Channel78 ReportNo.:CISRR240910076 -20- Left: TestResult ModulationPacketTypeChannel PeakOutput Power (dBm) PeakOutput Power (mW) Limit (dBm) Result GFSKDH5 01.961.57 ≤30 PASS 392.081.61PASS 781.631.45PASS π/4DQPSK2-DH5 02.341.71 ≤20.97 PASS 392.491.78PASS 782.121.63PASS 8DPSK3-DH5 02.461.76PASS 392.591.82PASS 782.261.68PASS TestGraphs PeakOutputPower GFSK_Channel0 PeakOutputPower GFSK_Channel39 PeakOutputPower GFSK_Channel78 PeakOutputPower π/4DQPSK_Channel0 ReportNo.:CISRR240910076 -21- PeakOutputPower π/4DQPSK_Channel39 PeakOutputPower π/4DQPSK_Channel78 PeakOutputPower 8DPSK_Channel0 PeakOutputPower 8DPSK_Channel39 PeakOutputPower 8DPSK_Channel78 ReportNo.:CISRR240910076 -22- 5)99%Bandwidth Right: TestResult ModulationChannelCenterFrequency(MHz)99%BW(MHz) GFSK 024020.86000 3924410.86240 7824800.87520 π/4DQPSK 024021.1800 3924411.1838 7824801.1812 8DPSK 024021.1780 3924411.1712 7824801.1728 TestGraphs GFSK_DH5_Channel0π/4DQPSK_2-DH5_Channel0 GFSK_DH5_Channel39π/4DQPSK_2-DH5_Channel39 ReportNo.:CISRR240910076 -23- GFSK_DH5_Channel78π/4DQPSK_2-DH5_Channel78 8DPSK_3-DH5_Channel08DPSK_3-DH5_Channel39 8DPSK_3-DH5_Channel78 ReportNo.:CISRR240910076 -24- Left: TestResult ModulationChannelCenterFrequency(MHz)99%BW(MHz) GFSK 024020.90700 3924410.92160 7824800.90240 π/4DQPSK 024021.2568 3924411.2536 7824801.2266 8DPSK 024021.2372 3924411.2370 7824801.2274 TestGraphs GFSK_DH5_Channel0π/4DQPSK_2-DH5_Channel0 GFSK_DH5_Channel39π/4DQPSK_2-DH5_Channel39 ReportNo.:CISRR240910076 -25- GFSK_DH5_Channel78π/4DQPSK_2-DH5_Channel78 8DPSK_3-DH5_Channel08DPSK_3-DH5_Channel39 8DPSK_3-DH5_Channel78 ReportNo.:CISRR240910076 -26- 6)20dBBandwidth Right: TestResult Modulation…

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ReportNo.:CISRR240910076 Page:1of33 TESTREPORT ReportNo.:CISRR240910076 ProjectNo.CISR240910076 FCCID2BK6K-J20 Applicant:DongguanQingzhuElectronicTechnologyCo.,Ltd Address:Room302,Building1,No.16IndustrialRoad,TangxiaTown,Dongguan City,GuangdongProvince,Dongguan,China ManufacturerDongguanQingzhuElectronicTechnologyCo.,Ltd AddressRoom302,Building1,No.16IndustrialRoad,TangxiaTown,Dongguan City,GuangdongProvince,Dongguan,China ProductName:WirelessEarphone TradeMark:-- Model/Typereference:J20 ListedModel(s):J50 Standard:Part15SubpartCSection15.247 Testdate:September10,2024~September18,2024 IssuedateSeptember28,2024 Testresult:Complied Preparedby:RoryHuangApprovedby:GenryLong Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. ReportNo.:CISRR240910076 Page:2of33 Contents 1.REPORTVERSION.........................................................................................................................................3 2.SUMMARYOFTESTRESULT.......................................................................................................................4 3.SUMMARY.....................................................................................................................................................5 3.1.ProductDescription....................................................................................................................................5 3.2.RadioSpecificationDescription................................................................................................................5 3.3.ModificationofEUT.....................................................................................................................................6 3.4.TestingSite...................................................................................................................................................6 3.5.FieldStrengthCalculation..........................................................................................................................6 3.6.DISTURBANCECalculation........................................................................................................................6 4.TESTCONFIGURATION.............................................................................................................................7 4.1.Testfrequencylist.......................................................................................................................................7 4.2.Testmode.....................................................................................................................................................7 4.3.Supportunitusedintestconfigurationandsystem...............................................................................8 4.4.Testsampleinformation.............................................................................................................................8 4.5.Testingenvironmentalcondition...............................................................................................................8 4.6.Statementofthemeasurementuncertainty.............................................................................................8 4.7.EquipmentUsedduringtheTest...............................................................................................................9 5.TESTCONDITIONSANDRESULTS.....................................................................................................10 5.1.AntennaRequirement...............................................................................................................................10 5.2.ACConductedEmission...........................................................................................................................11 5.3.PeakOutputPower....................................................................................................................................14 5.4.20dBBandwidth........................................................................................................................................15 5.5.99%OccupiedBandwidth.........................................................................................................................16 5.6.CarrierFrequenciesSeparation...............................................................................................................17 5.7.HoppingChannelNumber........................................................................................................................18 5.8.DwellTime..................................................................................................................................................19 5.9.DutyCycleCorrectionFactor(DCCF).....................................................................................................20 5.10.PseudorandomFrequencyHoppingSequence...................................................................................21 5.11.ConductedBandedgeandSpuriousEmission...................................................................................22 5.12.RadiatedBandedgeEmission...............................................................................................................23 5.13.RadiatedSpuriousEmission..................................................................................................................25 6.TESTSETUPPHOTOS............................................................................................................................33 7.EXTERNALANDINTERNALPHOTOS.................................................................................................33 7.1Externalphotos...........................................................................................................................................33 7.2Internalphotos..............................................................................................…

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FCCID:2BK6K-J20 RadiatedEmission Below1GHz: Above1GHz: FCCID:2BK6K-J20 ACConductedEmission