2BMCB-BASS-18Speaker

Shenzhen Wudong Technology Co.,Ltd. 2.911 (d)(7) USA Agent v 1.4 Section 2.911(d) (7) USA Agent for Service of Process Company name: Shenzhen Wudong Technology Co.,Ltd Address:Room 205, Building 28, Country Garden Yintian Industrial Zone, Xixiang Street, Baoan District, Shenzhen, China Product Name: Speaker FCC ID: 2BMCB-BASS-18 Model(s): BASS-18, BASS-01, BASS-02, BASS-03, BASS-04, BASS-05, BASS-06, BASS-07, BASS-08, BASS-09, BASS-10, BASS-11, BASS-12, BASS-13, BASS-14, BASS-15, BASS-16, BASS-17, BASS-20, BASS-100, BASS-200, BASS-300, BASS-400, BASS-500, BASS 2.911(d) (7) USA Designated Agent for Service of Process We, [Shenzhen Wudong Technology Co.,Ltd] (“the applicant”) designate [ CELLT INC.] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We Acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Agent obligation: We Acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: CELLT INC. Address: 1401 21ST ST # 12958 SACRAMENTO, CA 95811, USA FRN: 0036412567 Applicant Company name: Shenzhen Wudong Technology Co.,Ltd Address:Room 205, Building 28, Country Garden Yintian Industrial Zone, Xixiang Street, Baoan District, Shenzhen, China Shenzhen Wudong Technology Co.,Ltd. 2.911 (d)(7) USA Agent v 1.4 Contact Name: Thompson Lim Telephone No: 001-424-3474188 Email: [email protected] FRN: 0036308948 FCC Grantee Code:2BMCB-BASS-18 Contact Name: Changmei Yi Telephone No: 086 18627500367 Email: [email protected] Signature: Title: General Manager Signature: Title: Manager Date: 2026.06.29 Date:2026.06.29 NOTE 1: An applicant located in the United States may designate itself as the agent for service of process. Reference; Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-nation al-security-threats-to-the-communications-supply-chain-through-the

Rev 1/26/2023 Shenzhen Wudong Technology Co.,Ltd Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 06-29-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BMCB-BASS-18 (“Shenzhen Wudong Technology Co.,Ltd”) certifies 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. (“Shenzhen Wudong Technology Co.,Ltd”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) Changmei Yi (Applicant printed name) Rev 1/26/2023 Shenzhen Wudong Technology Co.,Ltd Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 06-29-2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BMCB-BASS-18 (“Shenzhen Wudong Technology Co.,Ltd”) certifies that, as of the date of the filing of the application, D2G Group LLC is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Changmei Yi

Shenzhen Wudong Technology Co.,Ltd Family models declaration letter 2026.06.29 We Shenzhen Wudong Technology Co.,Ltd Of Room 205, Building 28, Country Garden Yintian Industrial Zone, Xixiang Street, Baoan District, Shenzhen, China Declare under our sole responsibility that the product FCC ID: 2BMCB-BASS-18 Product: Speaker Model Number: BASS-18, BASS-01, BASS-02, BASS-03, BASS-04, BASS-05, BASS-06, BASS-07, BASS-08, BASS-09, BASS-10, BASS-11, BASS-12, BASS-13, BASS-14, BASS-15, BASS-16, BASS-17, BASS-20, BASS-100, BASS-200, BASS-300, BASS-400, BASS-500, BASS All models are the same except for the model name and the color. Changmei Yi/ Manager E-mail : [email protected] Phone : 086 18627500367 Fax : 086 18627500367 Address : Room 205, Building 28, Country Garden Yintian Industrial Zone, Xixiang Street, Baoan District, Shenzhen, China

Shenzhen Wudong Technology Co.,Ltd Date：06-29-2026 Product/ Model Number: BASS-18, BASS-01, BASS-02, BASS-03, BASS- 04, BASS-05, BASS-06, BASS-07, BASS-08, BASS-09, BASS-10, BASS-11, BASS-12, BASS-13, BASS-14, BASS-15, BASS-16, BASS-17, BASS-20, BASS-100, BASS-200, BASS-300, BASS-400, BASS-500, BASS FCC ID：2BMCB-BASS-18 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Changmei Yi Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: 086 18627500367 On behalf of: Shenzhen Wudong Technology Co.,Ltd

Shenzhen Wudong Technology Co.,Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: June 30, 2026 Subject; Request for Confidentiality FCC ID: 2BMCB-BASS-18 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Changmei Yi Title: Manager

Labe l: Speaker Model:BASS-18 FCC ID: 2BMCB-BASS-18 60mm 40mm

FCCID:2BMCB-BASS-18 RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093， UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤5.0mm,the1-gand10-gSARtest exclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f (GHz) ]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f (GHz) istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, SoaSARtestisnotrequired ModeFreque ncy (MHz) Max Power (dBm) Target power W/ tolerance (dBm) Maxtune uppower tolerance (dBm) Max Power (mW) Min. Distanc e (mm) Calc. threshol ds limit GFSK 24020.05 -0.8±1 0.21.04715.000.32463.0 2441-0.51 -0.8±1 0.21.04715.000.32723.0 2480-1.71 -0.8±1 0.21.04715.000.32983.0 Π /4-DQ PSK 24020.87 0 ± 1 11.25895.000.39023.0 24410.32 0 ± 1 11.25895.000.39343.0 2480-0.80 0 ± 1 11.25895.000.39653.0 8-DPS K 24021.44 0.5±1 1.51.41255.000.43783.0 24410.94 0.5±1 1.51.41255.000.44143.0 2480-0.24 0.5±1 1.51.41255.000.44493.0

ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26020619BE-1 TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of29 TESTREPORT Applicant:ShenzhenWudongTechnologyCo.,Ltd Address: Room205,Building28,CountryGardenYintianIndustrialZone, XixiangStreet,BaoanDistrict,Shenzhen,China Manufacturer:ShenzhenWudongTechnologyCo.,Ltd Address: Room205,Building28,CountryGardenYintianIndustrialZone, XixiangStreet,BaoanDistrict,Shenzhen,China ProductName:Speaker ModelNumber:BASS-18 Trademark:/ FCCID:2BMCB-BASS-18 TestDate:Jan.06,2026toJan.13,2026 DateofReport:Jan.13,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10-2020+Cor.1-2023 Preparedby(TestEngineer): CareyZheng Reviewer(Supervisor): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26020619BE-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.........................................................................................................................................6 1.7.BlockDiagram...............................................................................................................................................7 1.8.TestConditions.............................................................................................................................................7 1.9.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................7 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.CarrierFrequencySeparationTest....................................................…

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Test Report for the PCB Antenna in the 2.4G– 2.48G Frequency Band SPECIFICATIONS Frequency（MHz）2400-2480 Peak Gain（dBi）2.499 Average Gain（dBi）＞-4 VSWR＜3.2 Impedance（Ω）50Ω Antenna Type PCB Antenna PolarizationLinear Test Environment: CASIT Anechoic Chamber Test System Z X Y Actual Antenna and Physical Dimensions Passive Antenna S-Parameters: Voltage Standing Wave Ratio (VSWR), Return Loss, and Smith Chart Antenna Efficiency and Gain Frequency（MHz）Gain（dBi）Effciency（%）AverageGain（dBi）Efficiency（dB） 24001.43359.329%-2.717-2.267 24100.92751.861%-3.416-2.852 24200.82952.112%-3.166-2.831 24300.88149.299%-3.258-3.072 24401.19250.672%-3.144-2.952 24501.68853.067%-2.735-2.752 24602.19459.423%-2.276-2.260 24702.11856.680%-2.438-2.466 24802.49961.727%-2.112-2.095 Average1.52954.908%-2.806-2.616 Peak2.49961.727%-2.112-2.095 ANT2440MHz 2D-Theta Pattern ANT2440MHz 2D-Phi Pattern ANT2440MHz 3D-Horizontal Pattern ANT2440MHz 3D-Vertical Pattern 2440MHz 3D-Total Pattern Manufacturer:Shenzhen Wudong Technology Co.,Ltd Add:Room 205, Building 28, Country Garden Yintian Industrial Zone, Xixiang Street, Baoan District, Shenzhen, China

FCCIDEDR FCC_BT(Part15.247)TestData FCCID:2BMCB-BASS-18 ReportNo.:BKC26020619BE-1 TableofContents 1.DutyCycle.....................................................................................................................................................................2 2.-20dBBandwidth..........................................................................................................................................................7 3.99%OccupiedBandwidth..........................................................................................................................................12 4.PeakOutputPower.....................................................................................................................................................17 5.SpuriousEmissions.....................................................................................................................................................22 6.Bandedge....................................................................................................................................................................31 7.CarrierFrequenciesSeparation(Hopping).................................................................................................................44 8.NumberofHoppingChannel(Hopping)....................................................................................................................49 9.DwellTime(Hopping).................................................................................................................................................51 Page2of59 1.DutyCycle ConditionAntennaRateFrequency(MHz)Dutycycle(%)Duty_factor NVNTANT11-DH12402.0032.264.91 NVNTANT11-DH12441.0030.655.14 NVNTANT11-DH12480.0030.655.14 NVNTANT12-DH12402.0031.754.98 NVNTANT12-DH12441.0032.264.91 NVNTANT12-DH12480.0030.655.14 NVNTANT13-DH12402.0030.655.14 NVNTANT13-DH12441.0031.754.98 NVNTANT13-DH12480.0031.754.98 Duty_Cycle_NVNT_ANT1_1-DH1_2402 Page3of59 Duty_Cycle_NVNT_ANT1_1-DH1_2441 Duty_Cycle_NVNT_ANT1_1-DH1_2480 Page4of59 Duty_Cycle_NVNT_ANT1_2-DH1_2402 Duty_Cycle_NVNT_ANT1_2-DH1_2441 Page5of59 Duty_Cycle_NVNT_ANT1_2-DH1_2480 Duty_Cycle_NVNT_ANT1_3-DH1_2402 Page6of59 Duty_Cycle_NVNT_ANT1_3-DH1_2441 Duty_Cycle_NVNT_ANT1_3-DH1_2480 Page7of59 2.-20dBBandwidth ConditionAntennaModulationFrequency(MHz)-20dBBW(MHz)iflargerthanCFS NVNTANT11-DH12402.000.878No NVNTANT11-DH12441.000.878No NVNTANT11-DH12480.000.878No NVNTANT12-DH12402.001.254Yes NVNTANT12-DH12441.001.254Yes NVNTANT12-DH12480.001.255Yes NVNTANT13-DH12402.001.224Yes NVNTANT13-DH12441.001.223Yes NVNTANT13-DH12480.001.225Yes -20dB_Bandwidth_NVNT_ANT1_1-DH1_2402_00 -20dB_Bandwidth_NVNT_ANT1_1-DH1_2441_00 Page8of59 -20dB_Bandwidth_NVNT_ANT1_1-DH1_2480_00 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2402_00 Page9of59 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2441_00 -20dB_Bandwidth_NVNT_ANT1_2-DH1_2480_00 Page10of59 -20dB_Bandwidth_NVNT_ANT1_3-DH1_2402_00 -20dB_Bandwidth_NVNT_ANT1_3-DH1_2441_00 Page11of59 -20dB_Bandwidth_NVNT_ANT1_3-DH1_2480_00 Page12of59 3.99%OccupiedBandwidth ConditionAntennaModulationFrequency(MHz)99%%BW(MHz) NVNTANT11-DH12402.000.822 NVNTANT11-DH12441.000.821 NVNTANT11-DH12480.000.822 NVNTANT12-DH12402.001.164 NVNTANT12-DH12441.001.165 NVNTANT12-DH12480.001.166 NVNTANT13-DH12402.001.146 NVNTANT13-DH12441.001.147 NVNTANT13-DH12480.001.146 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2402_00 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2441_00 Page13of59 99%_Occupied_Bandwidth_NVNT_ANT1_1-DH1_2480_00 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2402_00 Page14of59 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2441_00 99%_Occupied_Bandwidth_NVNT_ANT1_2-DH1_2480_00 Page15of59 99%_Occupied_Bandwidth_NVNT_ANT1_3-DH1_2402_00 99%_Occupied_Bandwidth_NVNT_ANT1_3-DH1_2441_00 Page16of59 99%_Occupied_Bandwidth_NVNT_ANT1_3-DH1_2480_00 Page17of59 4.PeakOutputPower ConditionAntennaModulation Frequency (MHz) Max.Conducted Power(dBm) Max.Conducted Power(mW) Limit(mW)Result NVNTANT11-DH12402.000.051.011000Pass NVNTANT11-DH12441.00-0.510.891000Pass NVNTANT11-DH12480.00-1.710.671000Pass NVNTANT12-DH12402.000.871.22125Pass NVNTANT12-DH12441.000.321.08125Pass NVNTANT12-DH12480.00-0.800.83125Pass NVNTANT13-DH12402.001.441.39125Pass NVNTANT13-DH12441.000.941.24125Pass NVNTANT13-DH12480.00-0.240.95125Pass Peak_Output_Power_NVNT_ANT1_1-DH1_2402_00 Peak_Output_Power_NVNT_ANT1_1-DH1_2441_00 Page18of59 Peak_Output_Power_NVNT_ANT1_1-DH1_2480_00 Peak_Output_Power_NVNT_ANT1_2-DH1_2402_00 Page19of59 Peak_Output_Power_NVNT_ANT1_2-DH1_2441_00 Peak_Output_Power_NVNT_ANT1_2-DH1_2480_00 Page20of59 Peak_Output_Power_NVNT_ANT1_3-DH1_2402_00 Peak_Output_Power_NVNT_ANT1_3-DH1_2441_00 Page21of59 Peak_Output_Power_NVNT_ANT1_3-DH1_2480_00 Page22of59 5.SpuriousEmissions ConditionAntennaModulationTXModeRef_level(dBm) Spurious MAX.Value(dBm) LimitResult NVNTANT11-DH12402.000.003-47.139-19.997Pass NVNTANT11-DH12441.00-0.521-30.536-20.521Pass NVNTANT11-DH12480.00-1.747-44.062-21.747Pass NVNTANT12-DH12402.00-0.045-47.918-20.045Pass NVNTANT12-DH12441.00-0.582-46.341-20.582Pass NVNTANT12-DH12480.00-1.845-45.103-21.845Pass NVNTANT13-DH12402.00-0.032-47.743-20.032Pass NVNTANT13-DH12441.00-0.566-48.843-20.566Pass NVNTANT13-DH12480.00-1.785-45.396-21.785Pass 1_Reference_Level_NVNT_ANT1_1-DH1_2402_00 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2402_00 Page23of59 1_Reference_Level_NVNT_ANT1_1-DH1_2441_00 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2441_00 Page24of59 1_Reference_Level_NVNT_ANT1_1-DH1_2480_00 2_Spurious_Emissions_NVNT_ANT1_1-DH1_2480_00 Page25of59 1_Reference_Level_NVNT_ANT1_2-DH1_2402_00 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2402_00 Page26of59 1_Reference_Level_NVNT_ANT1_2-DH1_2441_00 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2441_00 Page27of59 1_Reference_Level_NVNT_ANT1_2-DH1_2480_00 2_Spurious_Emissions_NVNT_ANT1_2-DH1_2480_00 Page28of59 1_Reference_Level_NVNT_ANT1_3-DH1_2402_00 2_Spurious_Emissions_NVNT_ANT1_3-DH1_2402_00 Page29of59 1_Reference_Level_NVNT_ANT1_3-DH1_2441_00 2_Spurious_Emissions_NVNT_ANT1_3-DH1_2441…

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