2A86Y-BASS-37Bluetooth speaker

Shenzhen chengtai electronic and technology co.,LTD 6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications CommissionDate: Apr. 29, 26 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID: 2A86Y-BASS-37 Shenzhen chengtai electronic and technology co.,LTD (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List, established pursuant to§ 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section§ 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name:FangRuan Title: Manager Address:6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China Tel.:+86 17093468875 Email:[email protected]

Shenzhen chengtai electronic and technology co.,LTD Address:6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China 1|Page Attestation Statements To: Federal Communications CommissionDate: Apr. 29, 26 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID:[2A86Y-BASS-37] Product Name: [Bluetooth speaker] This letter serves as an attestation that the equipment identified above☐is /☒is not(select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined inFCC 22-84andKDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1.Does not containcybersecurity or anti-virus software produced or provided byKaspersky Lab, Inc.or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2.Does not have the capabilityto store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature Printed Name:FangRuan Title: Manager Address:6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,SanweiCommunity, Hangcheng Street,Baoan District,Shenzhen, China Tel.:+86 17093468875 Email:[email protected] Shenzhen chengtai electronic and technology co.,LTD Address:6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China 2|Page Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation ProcessResults Device is Inherent compliance ☒ The Chipset(s)used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ The Memoryused is limited to run the Cybersecurity or anti-virus software. Compliance ☒ There isstorage capacitylimitation for store or install the Cybersecurity or anti-virus software. Compliance ☒ Operating systemused is limited to run, install or deliver the Cybersecurity or anti-virus software. Compliance Device is not Inherent compliance ☐ Evaluation Based onSoftware Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based onScan for Software on the device ☐ Evaluation Based onFilesystem scan ☐ Evaluation Based onRunning software check

Shenzhenchengtaielectronicandtechnologyco.,LTD Address:6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,SanweiCommunity, HangchengStreet,BaoanDistrict,Shenzhen,China U.S.AgentLetterofAttestation To:FederalCommunicationsCommission 7435OaklandMillsRoad,Columbia,MD21046,USA Date:Apr.30,26 Ref: AttestationStatement–Part 2.911(d)(7)filing FCCID:2A86Y-BASS-37 [Shenzhenchengtaielectronicandtechnologyco.,LTD](“theapplicant”)certifiesthat,asofthedate ofthefilingoftheapplication,[CELLTINC.](“theagent”)isourdesignatedU.S.agentforserviceof processfortheabovereferenceFCCID.Theapplicantacceptstomaintainanagentforserviceof processintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,orthe conclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolvingtheequipment, whicheverislater.TheapplicantfurtheracknowledgesitisourresponsibilitytoinformtheFCC whenevertheagentinformationchanges. [CELLTINC.]("theagent)understanditistheagent'sobligationtoacceptserviceofprocessinthe UnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S.addressand emailaddress. DesignatedU.S.Agent CompanyName:CELLTINC. FRN:0036412567 GC:N/A Address:140121STST#12958SACRAMENTO,CA 95811UnitedStates Signature: ContactPerson:ThompsonLim Tel:001-424-3474188Email:[email protected] Applicant CompanyName:Shenzhenchengtaielectronicandtechnologyco.,LTD FRN:0033044058 Address:6thFloor,BuildingC,QinyuIndustrialZone, Sanwei,SanweiCommunity,HangchengStreet, BaoanDistrict,Shenzhen,China Signature: ContactPerson:FangRuan Tel:+8617093468875Email:[email protected]

Shenzhen chengtai electronic and technology co.,LTD Address: 6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China (Apr. 29, 26) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject:Confidentiality Request for: FCC ID: 2A86Y-BASS-37 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of the exhibits accompanying this certification application as outlined below :  Block Diagram  Schematics  Operational Description The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Pursuant to DA 04-1705, the applicant also requests temporary confidential treatment of the exhibits outlined below for a period of (up to 180) days from the date of equipment authorization and prior to marketing in the United States to prevent the premature release of any sensitive information. Applicant is aware of their responsibility to notify DERYCOM in the event information regarding the product or the product is made available to the public before the requested period has expired. User Manual Sincerely, (Signature) Title: Manager Address:6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China Tel.:+86 17093468875 Email:[email protected]

Shenzhen chengtai electronic and technology co.,LTD Address:6th Floor, BuildingC, Qinyu Industrial Zone, Sanwei, Sanwei Community, Hangcheng Street, Baoan District, Shenzhen, China (Apr. 29, 26) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2A86Y-BASS-37 I, the undersigned, hereby authorize (Shenzhen BKC Testing Co., Ltd.) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (Shenzhen BKC Testing Co., Ltd.) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES,INC., still resides with (Shenzhen chengtai electronic and technology co.,LTD). We certify that we are not subject to a denial of federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, (Signature) Contact Person:FangRuan (Title):Manager Tel:+86 17093468875 Fax:+86 17093468875 Email: [email protected]

FCC ID:2A86Y-BASS-37External Photos

Label: Model ： BASS-37 FCCID:2A86Y-BASS-37

Internal Photos FCC ID:2A86Y-BASS-37 PCBAnt

FCC ID:2A86Y-BASS-37 RF Exposure Evaluation According toKDB 447498 D01 General RF Exposure Guidance v06and part 2.1093 ， Unless specifically required by thepublished RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the correspondingSAR Test Exclusion Thresholdcondition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances≤5.0mm,the1-gand10-gSARtest exclusion thresholds aredetermined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)]ꞏ[√f (GHz) ]≤3.0 for 1-g SAR, and≤7.5 for 10-g extremity SAR, where f (GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to thenearest mW and mm before calculation The result is rounded to one decimal place for comparison Here, So a SAR test is not required Mode Frequen cy (MHz) Max Power (dBm) Target power W/ tolerance (dBm) Max tune up power tolerance (dBm) Max Power (mW) Min. Distance (mm) Calc. thresholds limit EDR GFSK 2402-0.55 -1.5±1 -0.50.89135.000.27633.0 2441-1.10 -1.5±1 -0.50.89135.000.27853.0 2480-2.15 -1.5±1 -0.50.89135.000.28073.0 Π /4-DQ PSK 24020.41 -0.5±1 0.51.12205.000.34783.0 2441-0.18 -0.5±1 0.51.12205.000.35063.0 2480-1.24 -0.5±1 0.51.12205.000.35343.0 8-DPS K 24020.99 0±1 11.25895.000.39023.0 24410.40 0±1 11.25895.000.39343.0 2480-0.64 0±1 11.25895.000.39653.0

深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 承认书 FIRSTARTICLEREPORT 客户名称：市目有限公司 客户型号： BASS-37 日期： 2026.01.09 核准：伍根生 客户确认 品质研发采购核准 请回签一份承认书给我司，谢谢！ 类型：□样板■首批量☑大批量 深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 地址：广东深圳宝安区西乡街道盐田社区银田工业区汇潮大厦218 深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 目录 1.测试工具..........................................................................................................................................................................................3 2.基本信息............................................................................................................................................................................................4 3.天线信息............................................................................................................................................................................................5 4.增益效率............................................................................................................................................................................................6 5.工程图................................................................................................................................................................................................7 深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 1. 测试工具 综测仪AgelentTechmologiesE5071B&R&SCMW500 暗室AtenlabM3 测试工程师刘超凡 温度25°C 湿度 65% （ RH ） 深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 天线制造商：深圳市美师傅科技有限公司 厂家地址： 广东深圳宝安区西乡街道盐田社区银田工业区汇潮大厦218 整机类型：3505_16C51 天线频段：2400MHZ2485MHZ 天线形式：板载倒F天线 馈电形式：双馈 馈脚数量：馈电点+馈地点 主板版号：3505_16C51-V1.0 天线增益：1.36dbi 天线型号：IBT-Banz-DF04 天线信息 深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 4.增益效率 深圳市美师傅科技有限公司 ShenzhenshiMEISHIFUTechnologyCo.,Ltd 7.工程图

FCC ID EDR FCC_BT (Part15.247) Test Data FCC ID:2A86Y-BASS-37 Report No.: BKC26010307AE-1 TableofContents 1. Duty Cycle..................................................................................................................................................................... 2 2.‐20dB Bandwidth..........................................................................................................................................................7 3. 99% Occupied Bandwidth.......................................................................................................................................... 12 4. Peak Output Power.....................................................................................................................................................17 5. Spurious Emissions..................................................................................................................................................... 22 6. Bandedge....................................................................................................................................................................31 7. Carrier Frequencies Separation (Hopping).................................................................................................................44 8. Number of Hopping Channel (Hopping).................................................................................................................... 49 9. Dwell Time (Hopping).................................................................................................................................................51 Page 2 of 59 1. Duty Cycle ConditionAntennaRateFrequency(MHz)Dutycycle(%)Duty_factor NVNTANT11-DH12402.0030.655.14 NVNTANT11-DH12441.0033.334.77 NVNTANT11-DH12480.0030.655.14 NVNTANT12-DH12402.0031.754.98 NVNTANT12-DH12441.0033.334.77 NVNTANT12-DH12480.0031.754.98 NVNTANT13-DH12402.0033.874.70 NVNTANT13-DH12441.0031.754.98 NVNTANT13-DH12480.0032.264.91 Duty_Cycle_NVNT_ANT1_1-DH1_2402 Duty_Cycle_NVNT_ANT1_1-DH1_2441 Page 3 of 59 Duty_Cycle_NVNT_ANT1_1-DH1_2480 Duty_Cycle_NVNT_ANT1_2-DH1_2402 Duty_Cycle_NVNT_ANT1_2-DH1_2441 Page 4 of 59 Duty_Cycle_NVNT_ANT1_2-DH1_2480 Duty_Cycle_NVNT_ANT1_3-DH1_2402 Page 5 of 59 Duty_Cycle_NVNT_ANT1_3-DH1_2441 Duty_Cycle_NVNT_ANT1_3-DH1_2480 Page 6 of 59 Page 7 of 59 2. -20dB Bandwidth ConditionAntennaModulationFrequency(MHz)-20dB BW(MHz)if larger than CFS NVNTANT11-DH12402.000.879No NVNTANT11-DH12441.000.878No NVNTANT11-DH12480.000.877No NVNTANT12-DH12402.001.255Yes NVNTANT12-DH12441.001.255Yes NVNTANT12-DH12480.001.253Yes NVNTANT13-DH12402.001.223Yes NVNTANT13-DH12441.001.245Yes NVNTANT13-DH12480.001.245Yes -20dB_Bandwidth_NVNT_ANT1_1-DH1_2402_00 -20dB_Bandwidth_NVNT_ANT1_1-DH1_2441_00 Page 8 of 59 -20dB_Bandwidth_NVNT_ANT1_1-DH1_2480_00 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2402_00 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2441_00 Page 9 of 59 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2480_00 -20dB_Bandwidth_NVNT_ANT1_3-DH1_2402_00 Page 10 of 59 -20dB_Bandwidth_NVNT_ANT1_3-DH1_2441_00 -20dB_Bandwidth_NVNT_ANT1_3-DH1_2480_00 Page 11 of 59 Page 12 of 59 3. 99% Occupied Bandwidth ConditionAntennaModulationFrequency(MHz)99%%BW(MHz) NVNTANT11-DH12402.000.822 NVNTANT11-DH12441.000.824 NVNTANT11-DH12480.000.823 NVNTANT12-DH12402.001.164 NVNTANT12-DH12441.001.166 NVNTANT12-DH12480.001.164 NVNTANT13-DH12402.001.147 NVNTANT13-DH12441.001.147 NVNTANT13-DH12480.001.144 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2402_00 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2441_00 Page 13 of 59 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2480_00 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2402_00 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2441_00 Page 14 of 59 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2480_00 99%_Occupied_Bandwidth_NVNT_ANT1_3-DH1_2402_00 Page 15 of 59 99%_Occupied_Bandwidth_NVNT_ANT1_3-DH1_2441_00 99%_Occupied_Bandwidth_NVNT_ANT1_3-DH1_2480_00 Page 16 of 59 Page 17 of 59 4. Peak Output Power Condition Antenna Modulation Frequency (MHz) Max. Conducted Power(dBm) Max. Conducted Power(mW) Limit(mW) Result NVNTANT11-DH12402.00-0.550.881000Pass NVNTANT11-DH12441.00-1.100.781000Pass NVNTANT11-DH12480.00-2.150.611000Pass NVNTANT12-DH12402.000.411.10125Pass NVNTANT12-DH12441.00-0.180.96125Pass NVNTANT12-DH12480.00-1.240.75125Pass NVNTANT13-DH12402.000.991.26125Pass NVNTANT13-DH12441.000.401.10125Pass NVNTANT13-DH12480.00-0.640.86125Pass Peak_Output_Power_NVNT_ANT1_1-DH1_2402_00 Peak_Output_Power_NVNT_ANT1_1-DH1_2441_00 Page 18 of 59 Peak_Output_Power_NVNT_ANT1_1-DH1_2480_00 Peak_Output_Power_NVNT_ANT1_2-DH1_2402_00 Peak_Output_Power_NVNT_ANT1_2-DH1_2441_00 Page 19 of 59 Peak_Output_Power_NVNT_ANT1_2-DH1_2480_00 Peak_Output_Power_NVNT_ANT1_3-DH1_2402_00 Page 20 of 59 Peak_Output_Power_NVNT_ANT1_3-DH1_2441_00 Peak_Output_Power_NVNT_ANT1_3-DH1_2480_00 Page 21 of 59 Page 22 of 59 5. Spurious Emissions ConditionAntennaModulationTX Mode Ref_level(dBm) Spurious MAX.Value(dBm) LimitResult NVNTANT11-DH12402.00-0.592-47.691-20.592Pass NVNTANT11-DH12441.00-1.112-46.920-21.112Pass NVNTANT11-DH12480.00-2.165-45.566-22.165Pass NVNTANT12-DH12402.00-0.575-46.929-20.575Pass NVNTANT12-DH12441.00-1.105-47.805-21.105Pass NVNTANT12-DH12480.00-2.159-45.590-22.159Pass NVNTANT13-DH12402.00-0.571-47.108-20.571Pass NVNTANT13-DH12441.00-1.138-47.907-21.138Pass NVNTANT13-DH12480.00-2.210-46.041-22.210Pass 1_Reference_Level_NVNT_ANT1_1-DH1_2402_00 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2402_00 Page 23 of 59 1_Reference_Level_NVNT_ANT1_1-DH1_2441_00 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2441_00 1_Reference_Level_NVNT_ANT1_1-DH1_2480_00 Page 24 of 59 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2480_00 1_Reference_Level_NVNT_ANT1_2-DH1_2402_00 Page 25 of 59 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2402_00 1_Reference_Level_NVNT_ANT1_2-DH1_2441_00 Page 26 of 59 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2441_00 1_Reference_Level_NVNT_ANT1_2-DH1_2480_00 Page 27 of 59 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2480_00 1_Reference_Level_NVNT_ANT1_3-DH1_2402_00 Page 28 of…

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ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26010307AE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of29 TESTREPORT Applicant:Shenzhenchengtaielectronicandtechnologyco.,LTD Address: 6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,Sanwei Community,HangchengStreet,BaoanDistrict,Shenzhen,China Manufacturer:Shenzhenchengtaielectronicandtechnologyco.,LTD Address: 6thFloor,BuildingC,QinyuIndustrialZone,Sanwei,Sanwei Community,HangchengStreet,BaoanDistrict,Shenzhen,China ProductName:Bluetoothspeaker ModelNumber:BASS-37 Trademark:HeavyBass FCCID:2A86Y-BASS-37 TestDate: Dec.31,2025–Jan.23,2026 DateofReport: Jan.23,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10-2020+Cor1+2023 Preparedby(TestEngineer): CareyZheng Reviewer(Supervisor): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26010307AE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of29 TABLEOFCONTENT 1.GeneralInformation......................................................................................5 1.1.DescriptionofDevice(EUT).......................................................................................................................5 1.2.ChannelList..................................................................................................................................................5 1.3.Summaryoftestresult................................................................................................................................6 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................6 1.5.Testmode......................................................................................................................................................6 1.6.Testconfiguration.........................................................................................................................................7 1.7.BlockDiagram...............................................................................................................................................7 1.8.TestConditions.............................................................................................................................................7 1.9.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................8 1.10.TestFacility..................................................................................................................................................8 1.11.TestEquipment...........................................................................................................................................8 2.Conductedemissionatthemainsterminalstest....................................10 2.1.Limit..............................................................................................................................................................10 2.2.TestSetup....................................................................................................................................................10 2.3.TestProcedure............................................................................................................................................10 2.4.TestResult...................................................................................................................................................11 3.RadiatedSpuriousEmissions...................................................................13 3.1.Limit..............................................................................................................................................................13 3.2.TestSetup....................................................................................................................................................14 3.3.TestProcedure............................................................................................................................................16 3.4.TestResult...................................................................................................................................................17 4.MaximumPeakOutputPower....................................................................22 4.1.Limit..............................................................................................................................................................22 4.2.TestSetup....................................................................................................................................................22 4.3.TestProcedure............................................................................................................................................22 4.4.TestResult...................................................................................................................................................22 5.-20dBBandwidthMeasurement...............................................................23 5.1.Limit..............................................................................................................................................................23 5.2.TestSetup....................................................................................................................................................23 5.3.TestProcedure............................................................................................................................................23 5.4.TestResult...................................................................................................................................................23 6.CarrierFrequenc…

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Test Photo FCC ID:2A86Y-BASS-37