2A988-LKC001NR08Active Noise Cancelling Wireless Headphones

ReportNo.:EED32P80136501Page 42 of 49 8 PHOTOGRAPHSOFEUTConstructionalDetails TestmodelNo.:NR08 ViewofProduct-1 ViewofProduct-2 ReportNo.:EED32P80136501Page 43 of 49 ViewofProduct-3 ViewofProduct-4 ReportNo.:EED32P80136501Page 44 of 49 ViewofProduct-5 ViewofProduct-6 ReportNo.:EED32P80136501Page 45 of 49 ViewofProduct-7

Size:3cm*1.35cm Transparent sticker with silver 877C text

ReportNo.:EED32P80136501Page 45 of 49 ViewofProduct-7 ViewofProduct-8 ReportNo.:EED32P80136501Page 46 of 49 ViewofProduct-9 ViewofProduct-10 ReportNo.:EED32P80136501Page 47 of 49 ViewofProduct-11 ViewofProduct-12 ReportNo.:EED32P80136501Page 48 of 49 ViewofProduct-13 ViewofProduct-14 ReportNo.:EED32P80136501Page 49 of 49 ViewofProduct-15 Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthis reportreferonlytothesample(s)tested.WithoutwrittenapprovalofCTI,thisreportcan’tbereproduced exceptinfull. ***EndofReport***

ReportNo.:EED32P80136502Page1of7 RFExposureEvaluationReport Product:ActiveNoiseCancellingWireless Headphones Trademark:Lighkeep Model/Typereference:NR08,BSNCH555 SerialNumber:N/A ReportNumber:EED32P80136502 FCCID:2A988-LKC001NR08 DateofIssue:Feb.23,2023 TestStandards: 47CFRPart1.1307 47CFRPart1.1310 47CFRPart2.1091 47CFRPart2.1093 447498D04InterimGeneralRF ExposureGuidancev01 Testresult:PASS Preparedfor: ShenZhenLighkeepCo.,Limited No19,BaotongSouthRoad,XikengCommunity, LonggangZone,ShenzhenCity,GuangdongProvince,China Preparedby : CentreTestingInternationalGroupCo.,Ltd. HongweiIndustrialZone,Bao’an70District, Shenzhen,Guangdong,China TEL:+86-755-33683668 FAX:+86-755-33683385 Compiledby:Reviewedby: MartinLeeTomChen Approvedby:Date:Feb.23,2023 AaronMa CheckNo.:4832090223 ReportNo.:EED32P80136502Page2of7 1Version VersionNo.DateDescription 00Feb.23,2023Original ReportNo.:EED32P80136502Page3of7 2Contents Page 1VERSION............................................................................................................................................................................2 2CONTENTS........................................................................................................................................................................3 3GENERALINFORMATION..............................................................................................................................................4 3.1C LIENT I NFORMATION .....................................................................................................................................4 3.2G ENERAL D ESCRIPTIONOF EUT....................................................................................................................4 3.3P RODUCT S PECIFICATIONSUBJECTIVETOTHISSTANDARD ..............................................................................4 3.4T EST L OCATION .............................................................................................................................................5 3.5D EVIATIONFROM S TANDARDS ........................................................................................................................5 3.6A BNORMALITIESFROM S TANDARD C ONDITIONS ...............................................................................................5 3.7O THER I NFORMATION R EQUESTEDBYTHE C USTOMER ....................................................................................5 4SAREVALUATION...........................................................................................................................................................6 4.1RFE XPOSURE C OMPLIANCE R EQUIREMENT ...................................................................................................6 4.1.1Limits.....................................................................................................................................................6 4.1.2TestProcedure.....................................................................................................................................6 4.1.3EUTRFExposureEvaluation...............................................................................................................7 ReportNo.:EED32P80136502Page4of7 3GeneralInformation 3.1ClientInformation Applicant:ShenZhenLighkeepCo.,Limited AddressofApplicant:No19,BaotongSouthRoad,XikengCommunity,LonggangZone,Shenzhen City,GuangdongProvince,China Manufacturer:ShenZhenLighkeepCo.,Limited AddressofManufacturer:No19,BaotongSouthRoad,XikengCommunity,LonggangZone,Shenzhen City,GuangdongProvince,China Factory:ShenZhenLighkeepCo.,Limited AddressofFactory:No19,BaotongSouthRoad,XikengCommunity,LonggangZone,Shenzhen City,GuangdongProvince,China 3.2GeneralDescriptionofEUT ProductName: ActiveNoiseCancellingWirelessHeadphones ModelNo.: NR08,BSNCH555 TestModelNo.: NR08 TradeMark: Lighkeep 3.3 ProductSpecificationsubjectivetothisstandard FrequencyRange:2402MHz~2480MHz ModulationType:GFSK,π/4DQPSK TestSoftwareofEUT:FCC_assist_1.0.2.2 AntennaType: PCBAntenna AntennaGain: 0dBi PowerSupply: USBport:DC5V Battery:DC3.7V SampleReceivedDate:Feb.14,2023 SampletestedDate: Feb.14,2023toFeb.20,2023 Remark： CompanyNameandAddressshownonReport,thesample(s)andsampleInformationwas/wereprovided bytheapplicantwhoshouldberesponsiblefortheauthenticitywhichCTIhasn’tverified. ReportNo.:EED32P80136502Page5of7 3.4TestLocation Alltestswereperformedat: CentreTestingInternationalGroupCo.,Ltd BuildingC,HongweiIndustrialParkBlock70,Bao'anDistrict,Shenzhen,China Telephone:+86(0)75533683668Fax:+86(0)75533683385 Notestsweresub-contracted. FCCDesignationNo.:CN1164 3.5DeviationfromStandards None. 3.6AbnormalitiesfromStandardConditions None. 3.7OtherInformationRequestedbytheCustomer None. ReportNo.:EED32P80136502Page6of7 4SAREvaluation 4.1RFExposureComplianceRequirement 4.1.1Limits TheSAR-basedexemptionformulaof§1.1307(b)(3)(i)(B),repeatedhereasFormula(B.2),appliesfor singlefixed,mobile,andportableRFsourceswithavailablemaximumtime-averagedpoweroreffective radiatedpower(ERP),whicheverisgreater,oflessthanorequaltothethresholdPth(mW). Thismethodshallonlybeusedatseparationdistancesfrom0.5cmto40cmandatfrequenciesfrom 0.3GHzto6GHz(inclusive).PthisgivenbyFormula andfisinGHz,distheseparationdistance(cm),andERP20cmisperFormula(B.1). The1mWBlanketExemptionof§1.1307(b)(3)(i)(A)appliesforsinglefixed,mobile,andportableRF sourceswithavailablemaximumtime-averagedpowerofnomorethan1mW,regardlessofseparation distance. 4.1.2TestProcedure SoftwareprovidedbyclientenabledtheEUTtotransmitandreceivedataatlowest,middleandhighest channelindividually. ReportNo.:EED32P80136502Page7of7 4.1.3EUTRFExposureEvaluation ForBLE Frequency (MHz) Separation distance(cm) Max. Conducted Output power(dBm) Antenna Gain(dBi) ERP (dBm) ERP (mW) Limit (mW) Result 24410.5-0.580-2.730.5333PASS Note： ①EIRP=conductedpower+antennagain； ②ERP=EIRP-2.15 ③Onlytheworstcasedatawasrecordedinthereport. Thetestreportiseffectiveonlywithbothsignature…

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Report No.: EED32P80136501Page 1 of 48 Appendix: Bluetooth Classic Report No.: EED32P80136501Page 2 of 48 Contents Contents .................................................................................................................................................................................................................................... 2 Dwell Time ................................................................................................................................................................................................................................ 3 Duty Cycle .............................................................................................................................................................................................................................. 10 Maximum Peak Conducted Output Power ....................................................................................................................................................................... 14 -20dB Bandwidth ................................................................................................................................................................................................................... 18 Occupied Channel Bandwidth ............................................................................................................................................................................................ 22 Carrier Frequencies Separation ......................................................................................................................................................................................... 26 Band Edge .............................................................................................................................................................................................................................. 30 Band Edge(Hopping) ............................................................................................................................................................................................................ 35 Conducted RF Spurious Emission ..................................................................................................................................................................................... 40 Number of Hopping Channel .............................................................................................................................................................................................. 47 Report No.: EED32P80136501Page 3 of 48 Dwell Time ConditionModeFrequency (MHz) AntennaPulse Time (ms) Total Dwell Time (ms) Burst Count Period Time (ms) Limit (ms) Verdict NVNT 1-DH12441Ant10.383122.17731931600400Pass NVNT 1-DH32441Ant11.639252.40615431600400Pass NVNT 1-DH52441Ant12.887294.47410231600400Pass NVNT 2-DH12441Ant10.392125.04831931600400Pass NVNT 2-DH32441Ant11.644276.19216831600400Pass NVNT 2-DH52441Ant12.892303.6610531600400Pass Report No.: EED32P80136501Page 4 of 48 Test Graphs Dwell NVNT 1-DH1 2441MHz Ant1 One Burst Dwell NVNT 1-DH1 2441MHz Ant1 Accumulated Report No.: EED32P80136501Page 5 of 48 Dwell NVNT 1-DH3 2441MHz Ant1 One Burst Dwell NVNT 1-DH3 2441MHz Ant1 Accumulated Report No.: EED32P80136501Page 6 of 48 Dwell NVNT 1-DH5 2441MHz Ant1 One Burst Dwell NVNT 1-DH5 2441MHz Ant1 Accumulated Report No.: EED32P80136501Page 7 of 48 Dwell NVNT 2-DH1 2441MHz Ant1 One Burst Dwell NVNT 2-DH1 2441MHz Ant1 Accumulated Report No.: EED32P80136501Page 8 of 48 Dwell NVNT 2-DH3 2441MHz Ant1 One Burst Dwell NVNT 2-DH3 2441MHz Ant1 Accumulated Report No.: EED32P80136501Page 9 of 48 Dwell NVNT 2-DH5 2441MHz Ant1 One Burst Dwell NVNT 2-DH5 2441MHz Ant1 Accumulated Report No.: EED32P80136501Page 10 of 48 Duty Cycle ConditionModeFrequency (MHz)AntennaDuty Cycle (%)Correction Factor (dB)1/T (kHz) NVNT1-DH52402Ant177.011.130.35 NVNT1-DH52441Ant177.011.130.35 NVNT1-DH52480Ant177.011.130.35 NVNT2-DH52402Ant177.161.130.35 NVNT2-DH52441Ant177.161.130.35 NVNT2-DH52480Ant177.161.130.35 Report No.: EED32P80136501Page 11 of 48 Test Graphs Duty Cycle NVNT 1-DH5 2402MHz Ant1 Duty Cycle NVNT 1-DH5 2441MHz Ant1 Report No.: EED32P80136501Page 12 of 48 Duty Cycle NVNT 1-DH5 2480MHz Ant1 Duty Cycle NVNT 2-DH5 2402MHz Ant1 Report No.: EED32P80136501Page 13 of 48 Duty Cycle NVNT 2-DH5 2441MHz Ant1 Duty Cycle NVNT 2-DH5 2480MHz Ant1 Report No.: EED32P80136501Page 14 of 48 Maximum Peak Conducted Output Power ConditionModeFrequency (MHz) AntennaConducted Power (dBm) Duty Factor (dB) Total Power (dBm) Limit (dBm) Verdict NVNT 1-DH52402Ant1-1.470-1.4721Pass NVNT 1-DH52441Ant1-1.410-1.4121Pass NVNT 1-DH52480Ant1-1.520-1.5221Pass NVNT 2-DH52402Ant1-0.690-0.6921Pass NVNT 2-DH52441Ant1-0.580-0.5821Pass NVNT 2-DH52480Ant1-0.780-0.7821Pass Report No.: EED32P80136501Page 15 of 48 Test Graphs Peak Power NVNT 1-DH5 2402MHz Ant1 Peak Power NVNT 1-DH5 2441MHz Ant1 Report No.: EED32P80136501Page 16 of 48 Peak Power NVNT 1-DH5 2480MHz Ant1 Peak Power NVNT 2-DH5 2402MHz Ant1 Report No.: EED32P80136501Page 17 of 48 Peak Power NVNT 2-DH5 2441MHz Ant1 Peak Power NVNT 2-DH5 2480MHz Ant1 Report No.: EED32P80136501Page 18 of 48 -20dB Bandwidth ConditionModeFrequency (MHz)Antenna-20 dB Bandwidth (MHz)Limit -20 dB Bandwidth (MHz)Verdict NVNT1-DH52402Ant10.9480Pass NVNT1-DH52441Ant10.9510Pass NVNT1-DH52480Ant10.9920Pass NVNT2-DH52402Ant11.2850Pass NVNT2-DH52441Ant11.2840Pass NVNT2-DH52480Ant11.3070Pass Report No.: EED32P80136501Page 19 of 48 Test Graphs -20dB Bandwidth NVNT 1-DH5 2402MHz Ant1 -20dB Bandwidth NVNT 1-DH5 2441MHz Ant1 Report No.: EED32P80136501Page 20 of 48 -20dB Bandwidth NVNT 1-DH5 2480MHz Ant1 -20dB Bandwidth NVNT 2-DH5 2402MHz Ant1 Report No.: EED32P80136501Page 21 of 48 -20dB Bandwidth NVNT 2-DH5 2441MHz Ant1 -20dB Bandwidth NVNT 2-DH5 2480MHz Ant1 Report No.: EED32P80136501Page 22 of 48 Occupied Channel Bandwidth ConditionModeFrequency (MHz)Antenna99% OBW (MH…

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ReportNo.:EED32P80136501Page1of49 TESTREPORT Product:ActiveNoiseCancellingWireless Headphones Trademark:Lighkeep Model/Typereference:NR08,BSNCH555 SerialNumber:N/A ReportNumber:EED32P80136501 FCCID:2A988-LKC001NR08 DateofIssue:Feb.23,2023 TestStandards: 47CFRPart15SubpartC Testresult:PASS Preparedfor: ShenZhenLighkeepCo.,Limited No19,BaotongSouthRoad,XikengCommunity, LonggangZone,ShenzhenCity,GuangdongProvince,China Preparedby : CentreTestingInternationalGroupCo.,Ltd. HongweiIndustrialZone,Bao’an70District, Shenzhen,Guangdong,China TEL:+86-755-33683668 FAX:+86-755-33683385 Compiledby:Reviewedby: MartinLeeTomChen Approvedby:Date:Feb.23,2023 AaronMa CheckNo.:4832090223 ReportNo.:EED32P80136501Page 2 of 49 1Contents Page 1CONTENTS......................................................................................................................................................................2 2VERSION..........................................................................................................................................................................3 3TESTSUMMARY............................................................................................................................................................4 4GENERALINFORMATION...........................................................................................................................................5 4.1C LIENT I NFORMATION ...................................................................................................................................5 4.2G ENERAL D ESCRIPTIONOF EUT..................................................................................................................5 4.3T EST C ONFIGURATION .................................................................................................................................7 4.4T EST E NVIRONMENT ....................................................................................................................................8 4.5D ESCRIPTIONOF S UPPORT U NITS ................................................................................................................8 5TESTRESULTSANDMEASUREMENTDATA.....................................................................................................13 5.1A NTENNA R EQUIREMENT ............................................................................................................................13 5.2M AXIMUM C ONDUCTED O UTPUT P OWER ....................................................................................................14 5.320 D BE MISSION B ANDWIDTH ......................................................................................................................15 5.4C ARRIER F REQUENCY S EPARATION ...........................................................................................................16 5.5N UMBEROF H OPPING C HANNEL .................................................................................................................17 5.6T IMEOF O CCUPANCY ................................................................................................................................18 5.7B ANDEDGE M EASUREMENTS .....................................................................................................................19 5.8C ONDUCTED S PURIOUS E MISSIONS ............................................................................................................20 5.9P SEUDORANDOM F REQUENCY H OPPING S EQUENCE ...................................................................................21 5.10R ADIATED S PURIOUS E MISSION &R ESTRICTEDBANDS .............................................................................23 6APPENDIXBTCLASSIC............................................................................................................................................39 7PHOTOGRAPHSOFTESTSETUP..........................................................................................................................40 8PHOTOGRAPHSOFEUTCONSTRUCTIONALDETAILS..................................................................................42 ReportNo.:EED32P80136501Page 3 of 49 2Version VersionNo.DateDescription 00Feb.23,2023Original ReportNo.:EED32P80136501Page 4 of 49 3TestSummary TestItemTestRequirementResult AntennaRequirement 47CFRPart15,SubpartCSection 15.203/15.247(c) PASS ACPowerLineConducted Emission 47CFRPart15,SubpartCSection 15.207 N/A MaximumConductedOutput Power 47CFRPart15,SubpartCSection 15.247(b)(1) PASS 20dBEmissionBandwidth 47CFRPart15,SubpartCSection 15.247(a)(1) PASS CarrierFrequency Separation 47CFRPart15,SubpartCSection 15.247(a)(1) PASS NumberofHoppingChannels 47CFRPart15,SubpartCSection 15.247(a)(1) PASS TimeofOccupancy47CFRPart15,SubpartCSection15.247(a)(1)PASS PseudorandomFrequency HoppingSequence 47CFRPart15,SubpartCSection 15.247(b)(4) PASS BandEdgeMeasurements 47CFRPart15,SubpartCSection 15.247(d) PASS ConductedSpurious Emissions 47CFRPart15,SubpartCSection 15.247(d) PASS RadiatedSpurious emissions 47CFRPart15,SubpartCSection15.205/15.209PASS Restrictedbandsaround fundamentalfrequency 47CFRPart15,SubpartCSection15.205/15.209PASS N/A:WhentheEUTcharging,BTwillnotwork,SoNotApplicable. Remark: CompanyNameandAddressshownonReport,thesample(s)andsampleInformationwereprovidedbythe applicantwhoshouldberesponsiblefortheauthenticitywhichCTIhasn’tverified. ReportNo.:EED32P80136501Page 5 of 49 4GeneralInformation 4.1 ClientInformation Applicant:ShenZhenLighkeepCo.,Limited AddressofApplicant:No19,BaotongSouthRoad,XikengCommunity,LonggangZone, ShenzhenCity,GuangdongProvince,China Manufacturer:ShenZhenLighkeepCo.,Limited AddressofManufacturer:No19,BaotongSouthRoad,XikengCommunity,LonggangZone, ShenzhenCity,GuangdongProvince,China Factory:ShenZhenLighkeepCo.,Limited AddressofFactory:No19,BaotongSouthRoad,XikengCommunity,LonggangZone, ShenzhenCity,GuangdongProvince,China 4.2 GeneralDescriptionofEUT Produc…

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ReportNo.:EED32P80136501Page 40 of 49 7 PHOTOGRAPHSOFTESTSETUP TestmodelNo.:NR08 RadiatedspuriousemissionTestSetup-1 (Below1GHz) RadiatedspuriousemissionTestSetup-2( Above1GHz) ReportNo.:EED32P80136501Page 41 of 49 RadiatedspuriousemissionTestSetup-3( Above1GHz) Thereareabsorbingmaterialsundertheground.