2BU2A-CHJ678Wireless Speaker

ThankyouandcongratulationsonyourchoiceofourBluetoothSpeaker.Beforeusingthisspeaker,pleasetakeafew minutestoreadthismanual. Buttom Shortpress Longpress Doublepress NextsongVOL+ — Play/PauseON/OFF — Connectionmode （Wrieless/TF/USB) LightsmodeSwitchthelights PrevioussongVOL- — Switchthelights— ON/OFF Play/Pause —— Specifications Bluetoothversion:5.1 Transmissiondistance:10m Speakerdrivers:fullrangespeaker×2pcs, Speakeroutput:25W 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.This equipmentgenerates, uses,and can radiateradiofrequencyenergy,and if not installedand usedin accordancewiththe instructions,maycauseharmfulinterferenceto radiocommunications.How ever,thereis no guaranteethatinterferencewill not occurin a particularinstallation.If th is equipmentdoescauseharmfulinterferenceto radioor televisionreception,whichcan be determinedby turningthe equipmentoff and on, the useris encouragedto try to correctthe interferenceby one or moreof the fo llowingmeasures: – 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. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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. MADE IN CHINA

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 2BU2A-CHJ678 CH678 We, Applicant Company Name: Shenzhen Kai Sheng Jia Technology Co., Ltd. Address: Block A3, Bullding B5, Anle Industrlal Park, XldangStreet, Bao'an District, Shenzhen, China Phone: +86-15099933025 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, 2026-03-09 Signature Date Name / Title: Ling Ouyang / Manager Company: Shenzhen Kai Sheng Jia Technology Co., Ltd. Address: 2F, 13 Building, No.2388, Xiupu Road, Pudong Dist, Shanghai 201315, P.R.China Phone: +86-15099933025 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 2BU2A-CHJ678 CH678 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: 2026-03-05

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 2BU2A-CHJ678 CH678 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, 2026-03-09 Signature Date Name / Title: Ling Ouyang / Manager Company: Shenzhen Kai Sheng Jia Technology Co., Ltd. Address: 2F, 13 Building, No.2388, Xiupu Road, Pudong Dist, Shanghai 201315, P.R.China Phone: +86-15099933025 Fax: N/A E-Mail: [email protected]

Externalphotos FCC ID: 2BU2A-CHJ678

Internalphotos FCC ID: 2BU2A-CHJ678 Antenna

SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD 102A,102B,Building2,ShanghenglangNewIndustrialZone,ShanghenglangCommunity, DalangStreet,LonghuaDistrict,Shenzhen,Guangdong,People’sRepublicofChina,518000 Telephone:+86-755-26648640 Fax:+86-755-26648637 Website:www.cqa-cert.com ReportTemplateVersion:V06 ReportTemplateRevisionDate:2026-01-30 RFExposureEvaluationReport Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthisreportreferonlyto thesample(s)tested.WithoutwrittenapprovalofCQA,thisreportcan’tbereproducedexceptinfull. ReportNo.:CQASZ20260100292E-02 Applicant: ShenzhenKaiShengJiaTechnologyCo.,Ltd. AddressofApplicant: BlockA3,BuildingB5,AnleIndustrialPark,XixiangStreet,Bao'anDistrict, Shenzhen EquipmentUnderTest(EUT): EUTName: WirelessSpeaker ModelNo.:CHJ678 TestModelNo.:CHJ678 BrandName: N/A FCCID:2BU2A-CHJ678 Standards: 47CFRPart1.1307 47CFRPart2.1093 KDB447498D04InterimGeneralRFExposureGuidancev01 DateofReceipt:2026-01-29 DateofTest:2026-01-29to2026-02-08 DateofIssue:2026-03-05 TestResult:PASS* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. TestedBy: (LewisZhou) ReviewedBy: (TimoLei) ApprovedBy: (JackAi) SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD. ReportNo.:CQASZ20260100292E-02 Page:2of7 1Version RevisionHistoryOfReport ReportNo.Version Description IssueDate CQASZ20260100292E-02Rev.01 Initialreport 2026-03-05 SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD. ReportNo.:CQASZ20260100292E-02 Page:3of7 2Contents 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.:CQASZ20260100292E-02 Page:4of7 3GeneralInformation 3.1ClientInformation Applicant: ShenzhenKaiShengJiaTechnologyCo.,Ltd. AddressofApplicant: BlockA3,BuildingB5,AnleIndustrialPark,XixiangStreet,Bao'anDistrict, Shenzhen Manufacturer: ShenzhenKaiShengJiaTechnologyCo.,Ltd. AddressofManufacturer: BlockA3,BuildingB5,AnleIndustrialPark,XixiangStreet,Bao'anDistrict, Shenzhen Factory: ShenzhenKaiShengJiaTechnologyCo.,Ltd. AddressofFactory: BlockA3,BuildingB5,AnleIndustrialPark,XixiangStreet,Bao'anDistrict, Shenzhen 3.2GeneralDescriptionofEUT ProductName:WirelessSpeaker ModelNo.: CHJ678 TestModelNo.: CHJ678 TradeMark:N/A SoftwareVersion: V1.0 HardwareVersion: V1.0 PowerSupply: Li-ionbatteryDC3.7V1200mAh,ChargebyDC5Vforadapter 3.3GeneralDescriptionofBT OperationFrequency:2402MHz~2480MHz ModulationType:GFSK,π/4DQPSK,8DPSK TransferRate:1Mbps/2Mbps/3Mbps NumberofChannel:79 ProductType:MobilePortableFixLocation AntennaType: PCBantenna AntennaGain: -0.58dBi SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD. ReportNo.:CQASZ20260100292E-02 Page:5of7 4SAREvaluation 4.1RFExposureComplianceRequirement 4.1.1StandardRequirement 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. 4.1.2Limits 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 powergeneratedbythedevicemaybeused…

Text truncated - open the document above for the full version.

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 102A,102B,Building2,ShanghenglangNewIndustrialZone,ShanghenglangCommunity, DalangStreet,LonghuaDistrict,Shenzhen,Guangdong,People’sRepublicofChina,518000 Telephone:+86-755-26648640 Fax:+86-755-26648637 Website:www.cqa-cert.com ReportTemplateVersion:V06 ReportTemplateRevisionDate:2026-01-30 TestReport Thetestreportiseffectiveonlywithbothsignatureandspecializedstamp,Theresult(s)showninthisreportreferonlyto thesample(s)tested.WithoutwrittenapprovalofCQA,thisreportcan’tbereproducedexceptinfull. ReportNo.:CQASZ20260100292E-01 Applicant: ShenzhenKaiShengJiaTechnologyCo.,Ltd. AddressofApplicant: BlockA3,BuildingB5,AnleIndustrialPark,XixiangStreet,Bao'anDistrict, Shenzhen EquipmentUnderTest(EUT): Product: WirelessSpeaker ModelNo.: CHJ678 TestModelNo.:CHJ678 BrandName: N/A FCCID: 2BU2A-CHJ678 Standards:47CFRPart15,SubpartC KDB558074D0115.247MeasGuidancev05r02 ANSIC63.10:2020 DateofReceipt:2026-01-29 DateofTest:2026-01-29to2026-02-08 DateofIssue:2026-03-05 TestResult:PASS* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedabove. TestedBy: (LewisZhou) ReviewedBy: (TimoLei) ApprovedBy: (JackAi) SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD ReportNo.:CQASZ20260100292E-01 Page:2of85 1Version RevisionHistoryOfReport ReportNo.Version Description IssueDate CQASZ20260100292E-01Rev.01 Initialreport 2026-03-05 SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD ReportNo.:CQASZ20260100292E-01 Page:3of85 2TestSummary TestItemTestRequirementTestmethodResult AntennaRequirement47CFRPart15.203/PASS ACPowerLineConducted Emission 47CFRPart15,SubpartCSection 15.207 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS ConductedPeakOutput Power 47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS 20dBOccupiedBandwidth47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS CarrierFrequencies Separation 47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS HoppingChannelNumber47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS DwellTime47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS PseudorandomFrequency HoppingSequence 47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS Band-edgeforRF ConductedEmissions 47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS RFConductedSpurious Emissions 47CFRPart15.247 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS RadiatedSpurious emissions 47CFRPart15.209 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS Restrictedbandsaround fundamentalfrequency (RadiatedEmission) 47CFRPart15.205/15.209 ANSI C63.10-2020+Cor. 1-2023+C63.10a-2024+ ErratatoC63.10a-2024 PASS SHENZHENHUAXIATESTINGTECHNOLOGYCO.,LTD ReportNo.:CQASZ20260100292E-01 Page:4of85 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.:CQASZ20260100292E-01 Page:5of85 3Contents Page 1VERSION..........................................................................................................................................................................2 2TESTSUMMARY............................................................................................................................................................3 3CONTENTS......................................................................................................................................................................5 4GENERALINFORMATION...........................................................................................................................................6 4.1CLIENTINFORMATION.................................................................................................................................................6 4.2GENERALDESCRIPTIONOFEUT.................................................................................................................................6 4.3ADDITIONALINSTRUCTIONS........................................................................................................................................8 4.4TESTENVIRONMENT...................................................................................................................................................9 4.5DESCRIPTIONOFSUPPORTUNITS...............................................................................................................................9 4.6TESTCONFIGURATION................................................................................................................................................9 4.7STATEMENTOFTHEMEASUREMENTUNCERTAINTY..................................................................................................10 4.8TESTLOCATION........................................................................................................................................................11 4.9TESTFACILITY..........................................................................................................................................................11 4.10ABNORMALITIESFROMSTANDARDCONDITIONS....................................................................................................11 4.11OTHERINFORMATIONREQUESTEDBYTHECUSTOMER..........................................................................................11 4.12EQUIPMENTLIST.................................................................................................................…

Text truncated - open the document above for the full version.

Setupphotos 1Photographs-EUTTestSetup 1.1RadiatedEmission 9KHz~30MHz: 30MHz~1GHz: FCC ID: 2BU2A-CHJ678 Above1GHz: 1.2ConductedEmission 1.3RFConductedmeasurement