2BQEB-CHJ181Wireless Speaker

ThankyouandcongratulationsonyourchoiceofourBluetoothSpeaker.Beforeusingthisspeaker,pleasetakeafew minutestoreadthismanual. ButtomShortpressLongpressDoublepress NextsongVOL+ — Play/PauseON/OFF— ConnectionmodeLightsmodeSwitchthelights PrevioussongVOL-— Specifications Bluetoothversion:5.1 Transmissiondistance:10m Speakerdrivers:fullrangespeaker×2pcs, Speakeroutput:10W SNR:≥75dB Chargingvoltage:DC5V Battery:3.7V-1200mAh *Transmissiondistanceistestedinopenspacewithoutinterference. *Theabovedataisbasedonlaboratoryenvironmentandtestresults;forreferenceonly. ImportantSafetyInformation Readallsafetyinformationbelowbeforeusingyourdevice: ·Useonlyauthorizedaccessorieswhicharecompatiblewithyourdevice. ·Thisdevice'soperatingtemperaturerangeiso°Cto40°C.Usingthisdeviceinanenvironmentoutsideofthistemperaturerange maydamagethedevice. ·Afterchargingiscomplete,disconnecttheadapterfromboththedeviceandthepoweroutlet.Donotchargethedevice formorethan12hours. ·Thebatterymustberecycledordisposedofseparatelyfromhouseholdwaste.Mishandlingthebatterymaycausefireor explosion.Disposeoforrecyclethedevice,itsbattery,andaccessoriesaccordingtoyourlocalregulations. ·Donotdisassemble,hit,crush,orburnthebattery.Ifthebatteryappearsdeformedordamaged,stopusingitimmediately. ●Donotshortcircuitthebattery,asthismaycauseoverheating,burns,orotherinjury. ·Donotplacethebatteryinahigh-temperatureenvironment. ·Donotdisassemble,hit,orcrushthebattery,asthismaycausethebatterytoleak,overheat,orexplode. ·Donotburnthebattery,asthismaycausefireorexplosion. ·Usershallnotremoveoralterthebattery.Removalorrepairofthebatteryshallonlybedone. ·Keepyourdevicedry. ·Donottrytorepairthedeviceyourself.Ifanypartofthedevicedoesnotworkproperly,contactcustomersupportorbring yourdevicetoanauthorizedrepaircenter. ·Connectotherdevicesaccordingtotheirinstructionmanuals.Donotconnectincompatibledevicestothisdevice. RoHScompliance-EuropeanUnion OurproductssoldintheEuropeanUnion,meettherequirementsofDirective2011/65/EUanditssubsequentamendments directive(EU)2015/863ontherestrictionoftheuseofcertainhazardoussubstancesinelectricalandelectronicequipment SimplifiedEUDeclarationofConformity Hereby,wedeclaresthatourspeakerisincompliancewiththecouncilRadioEquipmentDirective(RED)2014/53/EU. Note ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice,pursuanttoPart15ofthe FCCRules.Theselimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferenceinaresidential installation.Thisequipmentgenerates,uses,andcanradiateradiofrequencyenergy,andifnotinstalledandusedin accordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.However,thereisno guaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescauseharmfulinterferenceto radioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoffandon,theuserisencouragedtotry tocorrecttheinterferencebyoneormoreofthefollowingmeasures: –Reorientorrelocatethereceivingantenna. –Increasetheseparationbetweentheequipmentandreceiver. –Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiverisconnected. –Consultthedealeroranexperiencedradio/TVtechnicianforhelp. Changesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancecouldvoidtheuser’sauthorityto operatetheequipment. ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions: (1)thisdevicemaynotcauseharmfulinterference,and (2)thisdevicemustacceptanyinterferencereceived,includinginterferencethatmaycauseundesiredoperation. MADEINCHINA

Covered Equipment Attestation Letter For Certification Service in the USA Federal Communications Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Section 2.911(d)(5)(i)-(ii) of the Commission’s Rules (47 C.F.R.) we attest as follows for the product listed below: FCC ID Model name 2BQEB-CHJ181 CHJ181 We, Applicant Company Name: Shenzhen Cheng Hong Jia Technology Co., Ltd. Address: Floor 4, No.2, Lane 1, Haibin New Village, Bao yuan Raod, Gushu Community, XixiangStreet, Baoan Dist, Shenzhen 518101, China Phone: +86-13410868322 certify 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. This includes the cybersecurity and anti-virus software produced or provided by Kaspersky Lab, Inc. or any of ist successors and assignees. We certify 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. If you have any questions, please feel free to contact us at the address shown below. Sincerely, 2025-12-29 Signature Date Name / Title: Peixuan Yang / Quality leader Company: Shenzhen Cheng Hong Jia Technology Co., Ltd. Address: Floor 4, No.2, Lane 1, Haibin New Village, Bao yuan Raod, Gushu Community, XixiangStreet, Baoan Dist, Shenzhen 518101, China Phone: +86-13410868322 Fax: N/A E-Mail: [email protected]

Due Diligence Letter For Certification Service in the USA Federal Communications Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern FCC ID Model name 2BQEB-CHJ181 CHJ181 Pursuant to KDB 986446 D01 Covered Equipment Guidance the evaluation of the product above shows compliance for the following reasons: Compliance Evaluation process Results Inherent compliance The chipset(s) used is not capable of running the cybersecurity and/or anti-virus software Compliance The memory used does not allow the running the cybersecurity and/or anti-virus software Compliance The storage capacity does not allow the running the cybersecurity and/or anti-virus software Compliance The operating system used is not capable of running the cybersecurity and/or anti-virus software Compliance No inherent compliance Based on software bill of material Based on scan for running software on the device Based on filesystem scan for cybersecurity and/or anti-virus software The equipment for which authorization is sought complies with the rules and fulfils the requirements as detailed in the above mentioned KDB. Evaluation performed by Company Name: Shenzhen Huaxia Testing Technology Co., Ltd Contact Name: Yoyo Zhou Address: 1F., Block A of Tongsheng Technology Building, Huahui Road, Dalang Street, Longhua District, Shenzhen, China Phone: +86-755-26648642 Email: [email protected] Signature: Date: 2025-12-30

Confidentiality Request Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we request confidentiality for the documentation of the following products: FCC ID Model name 2BQEB-CHJ181 CHJ181 For the products listed above, we request permanent confidentiality for all applicable exhibits as there are: • the Operational Description • the Block Diagram • the Schematics • the Part List • the Tune up Information The above listed exhibits contain trade secrets and proprietary information that could be of benefit to our competitors. If you have any questions, please feel free to contact us at the address shown below. Sincerely, 2025-12-29 Signature Date Name / Title: Peixuan Yang / Quality leader Company: Shenzhen Cheng Hong Jia Technology Co., Ltd. Address: Floor 4, No.2, Lane 1, Haibin New Village, Bao yuan Raod, Gushu Community, XixiangStreet, Baoan Dist, Shenzhen 518101, China Phone: +86-13410868322 Fax: N/A E-Mail: [email protected]

Externalphotos FCC ID: 2BQEB-CHJ181

CHJ181FCCID:2BQEB-CHJ181 Size：5*15mm

Internalphotos ANT FCC ID: 2BQEB-CHJ181

ShenzhenHuaxiaTestingTechnologyCo.,Ltd 1F.,BlockAofTongshengTechnologyBuilding,HuahuiRoad,DalangStreet,LonghuaDistrict, Shenzhen,China Telephone:+86-755-26648640 Fax:+86-755-26648637 Website:www.cqa-cert.com ReportTemplateVersion:V05 ReportTemplateRevisionDate:2021-11-03 RFExposureEvaluationReport Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthisreportreferonlyto thesample(s)tested.WithoutwrittenapprovalofCQA,thisreportcan’tbereproducedexceptinfull. ReportNo.:CQASZ20251202848E-02 Applicant: ShenzhenChengHongJiaTechnologyCo.,Ltd. AddressofApplicant: Floor4,No.2,Lane1,HaibinNewVillage,BaoyuanRaod,GushuCommunity, XixiangStreet,BaoanDist,Shenzhen EquipmentUnderTest(EUT): EUTName:WirelessSpeaker ModelNo.:CHJ181 TestModelNo.:CHJ181 BrandName:N/A FCCID: 2BQEB-CHJ181 Standards: 47CFRPart1.1307 47CFRPart2.1093 KDB447498D04InterimGeneralRFExposureGuidancev01 DateofReceipt:2025-12-09 DateofTest: 2025-12-09to2025-12-18 DateofIssue:2025-12-30 TestResult:PASS* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. TestedBy: (LewisZhou) ReviewedBy: (TimoLei) ApprovedBy: (JackAi) ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-02 Page:2of7 Version RevisionHistoryOfReport ReportNo.Version Description IssueDate CQASZ20251202848E-02Rev.01 Initialreport 2025-12-30 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-02 Page:3of7 1Contents Page 1VERSION............................................................................................................................................................................2 2CONTENTS........................................................................................................................................................................3 ..................................................................................................................................................................................................3 3GENERALINFORMATION..............................................................................................................................................4 3.1CLIENTINFORMATION...................................................................................................................................................4 3.2GENERALDESCRIPTIONOFEUT...................................................................................................................................4 3.3GENERALDESCRIPTIONOFBT......................................................................................................................................4 4SAREVALUATION...........................................................................................................................................................5 4.1RFEXPOSURECOMPLIANCEREQUIREMENT.................................................................................................................5 4.1.1StandardRequirement......................................................................................................................................5 4.1.2Limits....................................................................................................................................................................5 4.1.3EUTRFExposure..............................................................................................................................................7 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-02 Page:4of7 2GeneralInformation 2.1ClientInformation Applicant: ShenzhenChengHongJiaTechnologyCo.,Ltd. AddressofApplicant: Floor4,No.2,Lane1,HaibinNewVillage,BaoyuanRaod,GushuCommunity, XixiangStreet,BaoanDist,Shenzhen Manufacturer: ShenzhenChengHongJiaTechnologyCo.,Ltd. AddressofManufacturer: Floor4,No.2,Lane1,HaibinNewVillage,BaoyuanRaod,GushuCommunity, XixiangStreet,BaoanDist,Shenzhen Factory: ShenzhenChengHongJiaTechnologyCo.,Ltd. AddressofFactory: Floor4,No.2,Lane1,HaibinNewVillage,BaoyuanRaod,Gushu Community,XixiangStreet,BaoanDist,Shenzhen 2.2GeneralDescriptionofEUT ProductName: WirelessSpeaker ModelNo.: CHJ181 TestModelNo.: CHJ181 TradeMark: N/A SoftwareVersion: CHJ181V1.1 HardwareVersion: CHJ181V1.1 PowerSupply: Li-ionbatteryDC3.7V1200mAh,ChargebyDC5Vforadapter 2.3GeneralDescriptionofBT OperationFrequency:2402MHz~2480MHz ModulationType:GFSK,π/4DQPSK,8DPSK TransferRate:1Mbps/2Mbps/3Mbps NumberofChannel:79 ProductType:MobilePortableFixLocation AntennaType: PCBantenna AntennaGain: -0.58dBi ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-02 Page:5of7 3SAREvaluation 3.1RFExposureComplianceRequirement 3.1.1StandardRequirement 447498D04InterimGeneralRFExposureGuidancev01 3.2.SARTestReductionGuidance SARtestreductionprocedures[Glossary]allowusingaparticularsetoftestdataasrepresentative ofother,similar,testconditions.Thismaybeappliedfordatawithindifferenttestpositions(e.g.body, head,extremity),wirelessmodes(e.g.Wi-Fi,cellular),andfrequencybands.Thistestreductionprocess providesfortheuseoftestdataforonespecificchannel,whilereferencingtothosedatafordemonstrating complianceinotherrequiredchannelsforeachtestpositionofanexposurecondition,withintheoperating modeofafrequencyband.Thisislimitedspecificallytowhenthereported1-gor10-gSARforthemid- bandorhighestoutputpowerchannelmeetsanyofthefollowingconditions. 3.1.2Limits SAR-basedthresholdsarederivedbasedonfrequency,power,andseparationdistanceoftheRF source.Theformuladefinesthethresholdsingeneralforeitheravailablemaximumtimeaveragedpoweror maximumtime-averagedERP,whicheverisgreater. IftheERPofadeviceisnoteasilydetermined,suchasforaportabledevicewithasmallform factor,theapplicantmayusetheavailablemaximumtime-averagedpowerexclusivelyifthe deviceantennaorradiatingstructuredoesnotexceedanelectricallengthofλ/4. Asfordeviceswithantennasoflengthgreaterthanλ/4wherethegainisnotwelldefined,but alwayslessthanthatofahalf-wavedipole(lengthλ/2),theavailablemaximumtime-averaged…

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Inverted F Antenna Specification Summary ITEM ANT SPEC Model Name 2.4G PCB ANT Horizontal Vertical 2400MHz 2450MHz2500MHz2400MHz2450MHz 2500MHz Center Frequency -1.26 -0.76 -0.58 -5.25 -2.46 -1.86 MAX. Gain -0.58dBi Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 15.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) Address: No. 333, Kexing Road, Xiangzhou District, Zhuhai City Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

ShenzhenHuaxiaTestingTechnologyCo.,Ltd. 1F.,BlockAofTongshengTechnologyBuilding,HuahuiRoad,DalangStreet,LonghuaDistrict, Shenzhen,China Telephone:+86-755-26648640 Fax:+86-755-26648637 Website:www.cqa-cert.com ReportTemplateVersion:V05 ReportTemplateRevisionDate:2021-11-03 TestReport Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthisreportreferonlyto thesample(s)tested.WithoutwrittenapprovalofCQA,thisreportcan’tbereproducedexceptinfull. ReportNo.:CQASZ20251202848E-01 Applicant: ShenzhenChengHongJiaTechnologyCo.,Ltd. AddressofApplicant: Floor4,No.2,Lane1,HaibinNewVillage,BaoyuanRaod,GushuCommunity, XixiangStreet,BaoanDist,Shenzhen EquipmentUnderTest(EUT): Product: WirelessSpeaker ModelNo.: CHJ181 TestModelNo.:CHJ181 BrandName: N/A FCCID: 2BQEB-CHJ181 Standards:47CFRPart15,SubpartC KDB558074D0115.247MeasGuidancev05r02 ANSIC63.10:2020 DateofReceipt:2025-12-09 DateofTest: 2025-12-09to2025-12-18 DateofIssue:2025-12-30 TestResult:PASS* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. TestedBy: (LewisZhou) ReviewedBy: (TimoLei) ApprovedBy: (JackAi) ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:2of85 1Version RevisionHistoryOfReport ReportNo.Version Description IssueDate CQASZ20251202848E-01Rev.01 Initialreport 2025-12-30 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:3of85 2TestSummary TestItemTestRequirementTestmethodResult AntennaRequirement47CFRPart15.203/PASS ACPowerLineConducted Emission 47CFRPart15,SubpartCSection 15.207 ANSIC63.10-2020PASS ConductedPeakOutput Power 47CFRPart15.247ANSIC63.10-2020PASS 20dBOccupiedBandwidth47CFRPart15.247ANSIC63.10-2020PASS CarrierFrequencies Separation 47CFRPart15.247ANSIC63.10-2020PASS HoppingChannelNumber47CFRPart15.247ANSIC63.10-2020PASS DwellTime47CFRPart15.247ANSIC63.10-2020PASS PseudorandomFrequency HoppingSequence 47CFRPart15.247ANSIC63.10-2020PASS Band-edgeforRF ConductedEmissions 47CFRPart15.247ANSIC63.10-2020PASS RFConductedSpurious Emissions 47CFRPart15.247ANSIC63.10-2020PASS RadiatedSpurious emissions 47CFRPart15.209ANSIC63.10-2020PASS Restrictedbandsaround fundamentalfrequency (RadiatedEmission) 47CFRPart15.205/15.209ANSIC63.10-2020PASS Remark: Thetestedsample(s)andthesampleinformationareprovidedbytheclient. Tx:InthiswholereportTx(ortx)meansTransmitter. Rx:InthiswholereportRx(orrx)meansReceiver. RF:InthiswholereportRFmeansRadiatedFrequency. CH:InthiswholereportCHmeanschannel. Volt:InthiswholereportVoltmeansVoltage. Temp:InthiswholereportTempmeansTemperature. Humid:InthiswholereportHumidmeanshumidity. Press:InthiswholereportPressmeansPressure. N/A:Inthiswholereportnotapplication ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:4of85 3Contents Page 1VERSION..........................................................................................................................................................................2 2TESTSUMMARY............................................................................................................................................................3 3CONTENTS......................................................................................................................................................................4 4GENERALINFORMATION...........................................................................................................................................5 4.1CLIENTINFORMATION.................................................................................................................................................5 4.2GENERALDESCRIPTIONOFEUT.................................................................................................................................5 4.3ADDITIONALINSTRUCTIONS........................................................................................................................................7 4.4TESTENVIRONMENT...................................................................................................................................................8 4.5DESCRIPTIONOFSUPPORTUNITS...............................................................................................................................8 4.6TESTCONFIGURATION................................................................................................................................................8 4.7STATEMENTOFTHEMEASUREMENTUNCERTAINTY....................................................................................................9 4.8TESTLOCATION........................................................................................................................................................10 4.9TESTFACILITY..........................................................................................................................................................10 4.10ABNORMALITIESFROMSTANDARDCONDITIONS....................................................................................................10 4.11OTHERINFORMATIONREQUESTEDBYTHECUSTOMER..........................................................................................10 4.12EQUIPMENTLIST.....................................................................................................................................................11 5TESTRESULTSANDMEASUREMENTDATA.....................................................................................................12 5.1ANTENNAREQUIREMENT..........................................................................................................................................12 5.2CONDUCTEDEMISSIONS............................................................................................................................................13 5.3CONDUCTEDPEAKOUTPUTPOWER.........................................................................................................................17 5.420DBOCCUP…

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ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:56of85 DH5_Ant1_2441_0~Reference DH5_Ant1_2441_30~1000 DH5_Ant1_2441_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:57of85 DH5_Ant1_2480_0~Reference DH5_Ant1_2480_30~1000 DH5_Ant1_2480_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:58of85 2DH5_Ant1_2402_0~Reference 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:59of85 2DH5_Ant1_2441_0~Reference 2DH5_Ant1_2441_30~1000 2DH5_Ant1_2441_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:60of85 2DH5_Ant1_2480_0~Reference 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:61of85 3DH5_Ant1_2402_0~Reference 3DH5_Ant1_2402_30~1000 3DH5_Ant1_2402_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:62of85 3DH5_Ant1_2441_0~Reference 3DH5_Ant1_2441_30~1000 3DH5_Ant1_2441_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:63of85 3DH5_Ant1_2480_0~Reference 3DH5_Ant1_2480_30~1000 3DH5_Ant1_2480_1000~26500 ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:64of85 Remark: Pretest9kHzto25GHz,findthehighestpointwhentesting,soonlytheworstdatawereshowninthetest report.PerFCCPart15.33(a)and15.31(o),Theamplitudeofspuriousemissionsfromintentionalradiators whichareattenuatedmorethan20dBbelowthepermissiblevalueneednotbereportedunlessspecifically requiredelsewhereinthispart. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:65of85 5.10 OtherrequirementsFrequencyHoppingSpreadSpectrumSystem TestRequirement:47CFRPart15CSection15.247(a)(1),(h)requirement: Thesystemshallhoptochannelfrequenciesthatareselectedatthesystemhopping ratefromaPseudorandomorderedlistofhoppingfrequencies.Eachfrequencymustbeusedequally ontheaveragebyeachtransmitter.Thesystemreceiversshallhaveinputbandwidthsthatmatchthe hoppingchannelbandwidthsoftheircorrespondingtransmittersandshallshiftfrequenciesin synchronizationwiththetransmittedsignals. Frequencyhoppingspreadspectrumsystemsarenotrequiredtoemployallavailablehopping channelsduringeachtransmission.However,thesystem,consistingofboththetransmitterandthe receiver,mustbedesignedtocomplywithalloftheregulationsinthissectionshouldthe transmitterbepresentedwithacontinuousdata(orinformation)stream.Inaddition,asystem employingshorttransmissionburstsmustcomplywiththedefinitionofafrequencyhoppingsystem andmustdistributeitstransmissionsovertheminimumnumberofhoppingchannelsspecifiedin thissection. Theincorporationofintelligencewithinafrequencyhoppingspreadspectrumsystemthatpermits thesystemtorecognizeotheruserswithinthespectrumbandsothatitindividuallyand independentlychoosesandadaptsitshopsetstoavoidhoppingonoccupiedchannelsispermitted. Thecoordinationoffrequencyhoppingsystemsinanyothermannerfortheexpresspurposeof avoidingthesimultaneousoccupancyofindividualhoppingfrequenciesbymultipletransmittersis notpermitted. Complianceforsection15.247(a)(1) AccordingtoBluetoothCoreSpecification,thepseudorandomsequencemaybegeneratedinanine- stageshiftregisterwhose5thand9thstage outputsareaddedinamodulo-twoadditionstage.Andtheresultisfedbacktotheinputofthefirst stage.ThesequencebeginswiththefirstONEof9consecutiveONEs;i.e.theshiftregisterisinitialized withnineones. •Numberofshiftregisterstages:9 •Lengthofpseudo-randomsequence:2 9 -1=511bits •Longestsequenceofzeros:8(non-invertedsignal) AnexampleofPseudorandomFrequencyHoppingSequenceasfollow: Eachfrequencyusedequallyontheaveragebyeachtransmitter. AccordingtoBluetoothCoreSpecification,BluetoothreceiversaredesignedtohaveinputandIF bandwidthsthatmatchthehoppingchannelbandwidthsofanyBluetoothtransmittersandshift frequenciesinsynchronizationwiththetransmittedsignals. Complianceforsection15.247(g) AccordingtoBluetoothCoreSpecification,theBluetoothsystemtransmitsthepacketwiththe pseudorandomhoppingfrequencywithacontinuousdataandtheshortbursttransmissionfromthe Bluetoothsystemisalsotransmittedunderthefrequencyhoppingsystemwiththepseudorandom hoppingfrequencysystem. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:66of85 Complianceforsection15.247(h) AccordingtoBluetoothCorespecification,theBluetoothsystemincorporateswithanadaptive systemtodetectotheruserwithinthespectrumbandsothatitindividuallyandindependentlyto avoidhoppingontheoccupiedchannels. AccordingtotheBluetoothCorespecification,theBluetoothsystemisdesignednothavetheability tocoordinatedwithotherFHSSSysteminanefforttoavoidthesimultaneousoccupancyofindividual hoppingfrequenciesbymultipletransmitter. ShenzhenHuaxiaTestingTechnologyCo.,Ltd. ReportNo.:CQASZ20251202848E-01 Page:67of85 5.11 RadiatedSpuriousEmission&Restrictedbands TestRequirement:47CFRPart15CSection15.209and15.205 TestMethod:ANSIC63.10:2020 TestSite:MeasurementDistance:3m(Semi-AnechoicChamber) ReceiverSetup: FrequencyDetectorRBWVBWRemark 0.009MHz-0.090MHzPeak10kHz30kHzPeak 0.009MHz-0.090MHzAverage10kHz30kHzAverage 0.090MHz-0.110MHzQuasi-peak10kHz30kHzQuasi-peak 0.110MHz-0.490MHzPeak10kHz30kHzPeak 0.110MHz-0.490MHzAverage10kHz30kHzAverage 0.490MHz-30MHzQuasi-peak10kHz30kHzQuasi-peak 30MHz-1GHzPeak120kHz300kHzPeak Above1GHz Peak1MHz3MHzPeak Peak1MHz10HzAverage Limit: Frequency Fieldstrength (microvolt/meter) Limit (dBuV/m) Remark Measurement distance(m) 0.009MHz-0.490MHz2400/F(kHz)--300 0.490MHz-1.705MHz24000/F(kHz)--30 1.705MHz-30MHz30--30 30MHz-88MHz10040.0Quasi-peak3 88MHz-216MHz15043.5Quasi-peak3 216MHz-960MHz20046.0Quasi-peak3 960MHz-1GHz50054.0Quasi-peak3 Above1GHz50054.0Average3 Note:15.35(b),Unlessotherwisespecified,thelimitonpeakradiofrequency emissionsis20dBabovethemaximumpermittedaverageemissionlimit applicabletotheequipmentundertest.Thispeaklimitappliestothetotal peakemissionlevelradiatedbythedevice. ShenzhenHuaxiaTesting…

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Setupphotos 1Photographs-EUTTestSetup 1.1RadiatedEmission 9KHz~30MHz: 30MHz~1GHz: FCC ID: 2BQEB-CHJ181 Above1GHz: 1.2ConductedEmission 1.3RFConductedmeasurement