2BS3B-O202WiWU Openbuds Wireless Stereo

FCC Caution: 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. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- 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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.

CoveredEquipmentAttestationLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(5)(i)-(ii)oftheCommission’sRules(47C.F.R.)weattestas followsfortheproductlistedbelow: FCCIDModelname 2BS3B-O202O201,O202,O203,O204,O205,O206,O207,O 208,O209,O210 We, Applicant CompanyName:DongguanWeiwuSupplyChainCo.,Ltd. Address:Room401,Building11,No.243,Huaide Road,HumenTown,DongguanCity, GuangdongProvince,china Phone:+8613829218589 certifythattheequipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules.Thisincludesthecybersecurityandanti-virussoftwareproducedorprovidedby KasperskyLab,Inc.oranyofistsuccessorsandassignees. Wecertifythat,asofthedateofthefilingoftheapplication,theapplicantisnotidentified ontheCoveredListasanentityproducing“covered”equipment. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2025-12-29 SignatureDate PrintedNameofSignee:JasonZhu Company:DongguanWeiwuSupplyChain Co.,Ltd. Phone:13829218589 Email:[email protected] Address:Room401,Building11,No.243, HuaideRoad,HumenTown,DongguanCity, GuangdongProvince Fax:N/A

DongguanWeiwuSupplyChainCo.,Ltd. Room401,Building11,No.243,HuaideRoad,HumenTown,DongguanCity, GuangdongProvince Date:2026-01-04 FCCID:2BS3B-O202 ModelNumber:O201,O202,O203,O204,O205,O206,O207,O208,O209,O210 To:FederalCommunicationCommission AuthorizationandEvaluationDivision7435OaklandMillsRoad Columbia,MD21048 ToWhomItMayConcern, We,DongguanWeiwuSupplyChainCo.,Ltd.herebydeclarethatourproduct(Wireless Doorbell ) ModelNumber:O201,O202,O203,O204,O205,O206,O207,O208,O209,O210 electricalidentical,theSchematic,PCBlayout,structureandsoftwarearesame,onlythe differenceisthemodelnameformarketpurpose. Shouldyouhaveanyquestionsorcommentsregardingthismatter,pleasehave mybestattention. Sincerely, (Signed) Name/Title:JasonZhu/CTO Company:DongguanWeiwuSupplyChainCo.,Ltd. Address:Room401,Building11,No.243,HuaideRoad,HumenTown,DongguanCity, GuangdongProvince Phone:13829218589 FaxNumber:N/A E-Mail:[email protected]

ConfidentialityRequestLetter ForCertificationServiceintheUSA FederalCommunicationCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoParagraphs§0.457and0.459oftheCommission’sRules(47C.F.R.)andSection §552(b)(4)oftheFreedomofInformationAct,werequestconfidentialityforthe documentationofthefollowingproducts: FCCIDModelname 2BS3B-O202O201,O202,O203,O204,O205,O206,O207,O20 8,O209,O210 Fortheproductslistedabove,werequestpermanentconfidentialityforallapplicable exhibitsasthereare:  theOperationalDescription  theBlockDiagram theSchematics Theabovelistedexhibitscontaintradesecretsandproprietaryinformationthatcouldbeof benefittoourcompetitors. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-01-04 SignatureDate PrintedNameofSignee/Title:JasonZhu/CTO Company:DongguanWeiwuSupplyChainCo.,Ltd. Address:Room401,Building11,No.243,HuaideRoad,Humen Town,DongguanCity,GuangdongProvince,china Phone:13829218589 Fax:-- Email:[email protected]

ReportNo.:CISRR25122538901 Page 86 of 89 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR25122538901 Page 87 of 89

Label Size:30mm*10mm FCC ID:2BS3B-O202 Label Location

ReportNo.:CISRR25122538901 Page 88 of 89 9.2.InternalPhotos ANT ReportNo.:CISRR25122538901 Page 89 of 89 ------Endofthereport-----

ReportNo.:CISRR25122538902 Reporttemplateversion:CISE-TR-001-A0Page:1of5 TESTREPORT RFExposureEvaluation ReportNo.CISRR25122538902 ProjectNo.CISR251225389 FCCID2BS3B-O202 ApplicantDongguanWeiwuSupplyChainCo.,Ltd. Address Room401,Building11,No.243,HuaideRoad,HumenTown,Dongguan City,GuangdongProvince ManufacturerDongguanWeiwuSupplyChainCo.,Ltd. Address Room401,Building11,No.243,HuaideRoad,HumenTown,Dongguan City,GuangdongProvince ProductNameWiWUOpenbudsWirelessStereo TrademarkRICHJOY，WiWU Model/TypereferenceO202 ListedModel(s)O201,O203,O204,O205,O206,O207,O208,O209,O210 Standard 47CFRPart2.1093 DateofsamplereceiptDecember26,2025 TestdateDecember26,2025toDecember31,2025 IssuedateJanuary4,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.:CISRR25122538902 Reporttemplateversion:CISE-TR-001-A0Page:2of5 1.APPLICABLESTANDARD 47CFRPart2.1093:Radiofrequencyradiationexposureevaluation:portabledevices ANSIC95.1–3999:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadioFrequency ElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortableDevicesRF ExposureProceduresandEquipmentAuthorizationPolicies. 47CFRPart1.1307:Actionsthatmayhaveasignificantenvironmentaleffect,forwhichEnvironmental Assessments(EAs)mustbeprepared. 2.REPORTVERSION VersionNo.IssuedateDescription 00January4,2026Original ReportNo.:CISRR25122538902 Reporttemplateversion:CISE-TR-001-A0Page:3of5 3.RADIOSPECIFICATIONDESCRIPTION Bluetooth Supportedtype:BREDRLE-1Mbps LE-2Mbps Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS TheBluetoothheadsetscontaintwoparts:leftearbudandrightearbud,andthesetwoearbudscouldbe simultaneoustransmission. ReportNo.:CISRR25122538902 Reporttemplateversion:CISE-TR-001-A0Page:4of5 5.TESTRESULT 5.1.Standalonetransmission Limit: KDB447498D01v06,Clause4.3.1a) For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-g SARtestexclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]*[√f(GHz)]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation31The resultisroundedtoonedecimalplaceforcomparison Thevalues3.0and7.5arereferredtoasnumericthresholdsinstepb)below Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mm, andfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmaccordingto4.1f)isappliedtodetermine SARtestexclusion. Result: Passed TestData EUTRadiotype Frequency (GHz) Maximum output power #1 (dBm) Antenna gain #2 (dBi) Maximum EIRP #3 (dBm) Maximum tune-up EIRP #4 (dBm) Minimum distance (mm) Evaluated value LimitResult LeftBT2.4802.633.005.636.005.001.25393.00PASS RightBT2.4802.363.005.366.005.001.25393.00PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR25122538902 Reporttemplateversion:CISE-TR-001-A0Page:5of5 5.2.Simultaneoustransmission Limit: KDB447498D01v06,Clause4.3.2,47CFRPart1.1307 InthecaseofxedRFsourcesoperatinginthesametime-averagingperiod,orof multiplemobileorportableRFsourceswithinadeviceoperatinginthesametime averagingperiod,ifthesumofthefractionalcontributionstotheapplicablethresholds islessthanorequalto1asindicatedinthefollowingequation. Where a=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(B)ofthissectionforP,includingexistingexempttransmittersandthosebeing added. b=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(C)ofthissectionforThresholdERP,includingexistingexempttransmittersand thosebeingadded. c=numberofexistingfixed,mobile,orportableRFsourceswithknownevaluationforthespeci edminimumdistanceincludingexistingevaluatedtransmitters. P j =theavailablemaximumtime-averagedpowerortheERP,whicheverisgreater,forxed, mobile,orportableRFsourceiatadistancebetween0.5cmand40cm(inclusive). P th,j =theexemptionthresholdpower(P)accordingtoparagraph(b)(3)(i)(B)ofthissectionfor xed,mobile,orportableRFsourcei. ERP j =theERPoffixed,mobile,orportableRFsourcej. ERP th,j =exemptionthresholdERPforfixed,mobile,orportableRFsourcej,atadistanceofat leastλ/2πaccordingtotheapplicableformulaofparagraph(b)(3)(i)(C)ofthissection. Evaluated k =themaximumreportedSARorMPEoffixed,mobile,orportableRFsourcekeither inthedeviceoratthetransmittersitefromanexistingevaluationatthelocationofexposure. ExposureLimit k =eitherthegeneralpopulation/uncontrolledmaximumpermissibleexposure (MPE)orspecicabsorptionrate(SAR)limitforeachxed,mobile,orportableRFsourcek, asapplicablefrom§1.1310ofthischapter. Result:Passed TestData EUT Evaluated value Standalone Limit RaitoValue (Evaluatedvalue/ StandaloneLimit) Sum Simultaneous Limit Result Left 0.6185 30.418 0.8361.00PASS Right 0.6185 30.418 --------EndofReport--------

ReportNo.:CISRR25122538901 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of82 TESTREPORT ReportNo.CISRR25122538901 ProjectNo.CISR251225389 FCCID2BS3B-O202 ApplicantDongguanWeiwuSupplyChainCo.,Ltd. Address Room401,Building11,No.243,HuaideRoad,HumenTown,Dongguan City,GuangdongProvince ManufacturerDongguanWeiwuSupplyChainCo.,Ltd. Address Room401,Building11,No.243,HuaideRoad,HumenTown,Dongguan City,GuangdongProvince ProductNameWiWUOpenbudsWirelessStereo Trademark RICHJOY，WiWU Model/TypereferenceO202 ListedModel(s)O201,O203,O204,O205,O206,O207,O208,O209,O210 Standard 47CFRPart15.247 DateofsamplereceiptDecember26,2025 TestdateDecember26,2025toDecember31,2025 IssuedateJanuary4,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu ReportNo.:CISRR25122538901 Page 2 of 82 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................6 4.4.Deviationfromstandards...........................................................................................................................6 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Testsampleinformationy...........................................................................................................................7 5.4.Environmentalconditions...........................................................................................................................7 5.5.Statementofthemeasurementuncertainty.............................................................................................7 5.6.EquipmentUsedduringtheTest................................................................................................................8 6.TESTRESULTS.............................................................................................................................................10 6.1.EvaluationResults(Evaluation)...............................................................................................................10 6.1.1.AntennaRequirement............................................................................................................................10 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................11 6.2.1.ConductedEmissionatACpowerline.................................................................................................11 6.2.2.20dBBandwidth......................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................16 6.2.4.ChannelSeparation................................................................................................................................17 6.2.5.NumberofHoppingFrequencies..........................................................................................................18 6.2.6.DwellTime...............................................................................................................................................19 6.2.7.Conductedbandedgeandspuriousemission...................................................................................21 6.2.8.Radiatedbandedgeemission...............................................................................................................23 6.2.9.RadiatedSpuriousEmission(below1GHz).........................................................................................33 6.2.10.RadiatedSpuriousEmission(Above1GHz)......................................................................................39 7.APPENDIXREPORT......................................................................................................................................53 7.1.ConductedPeakOutputPower................................................................................................................53 7.2.20dBBandwidth.........................................................................................................................................57 7.3.NumberOfHoppingChannel...................................................................................................................61 7.4.CarrierFrequenciesSeparation.........................................…

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Application: WLAN, 802.11b/g, Bluetooth, etc ... Features SMD, high reliability, ultra Impact, Omni-directional ... Working Frequency Range 2400 ~2484 MHz Peak Gain 3.0dBi (Typ.) Impedance 50 Ohm Return loss 10 dB ( Min) PolarizationLinear Azimuth Beamwidth Omni-directional Operation Temperature(°C) -40 ~85°C Dimension (mm) L 3.15+-0.15 No.Terminal Name W 1.55+- 0.15 1 Feeding 2 Soldering T 0.5+-0.10 A 0.35+-0.10 (1)Product Type Chip Antenna (2) Size Code 3.2x1.6mm (3) Type Code H5 (4) Packing Tape and reel (5) Frequency 2.45GHz The specification is defined on EVB. Dimension and Terminal Configuration Part number HLX 3216 H5 P 2G45 (1) (2) (3) (4) (5) HLX3216P2G45H5 Electrical Specification 2.4GHz Shenzhen Helixun Technology Co., Ltd. Address1905, Building 2, Tiezai Road, Gongle Community, Xixiang Subdistrict, Bao'an District, Shenzhen City. Return Loss & Radiation Return Loss Radiation 2.45GHz PCB Dimension & Antenna Layout Reference unit :mm Frequency (MHz) S11 (dB) 2400-12.8 2442-19.8 2484-11.9 Frequency 2445MHz Peak gain 3.0dBi Efficiency 79.2% Evaluation Board Reference Electrical Characteristics HLX3216P2G45H5 Reel Taping Blister Tape Checking noteIndexSpec (mm) Sprocket hole D0 1.50 +0.10/-0.00 Checking noteIndexSpec (mm) Distance sprocket hole to outside E1 1.75 ± 0.10 Internal diameter of reel A 60.20 ± 0.50 Distance sprocket hole to pocket F 5.50 ± 0.05 External diameter of reel B 178 ± 1.00 Distance sprocket hole to sprocket hole P04.00 ± 0.10 Distance pocket to pocket P1 4.00 ± 0.10 Distance sprocket hole to pocket P2 2.00 ± 0.05 Quantity/per reel 5000 pcs Tape material Plastic (embossed) Tape width W 12.00 +0.30/-0.10 Pocket width nominal clearance A0 2.28 ± 0.13 Pocket length nominal clearance B0 5.70 ± 0.13 Pocket depth minimum clearance K0 1.58 ± 0.10 Thickness of tape T 0.23 ± 0.02 Taping Specifications HLX3216P2G45H5 Test Item Procedure Requirements Ceramic Type Remark (Reference) Electrical Characterization Fulfill the electrical specification User Spec. Thermal Shock 1. Preconditioning: 50 ± 10°C / 1 hr , then keep for 24 ± 1 hrs at room temp. 2. Initial measure: Spec: refer Initial spec. 3. Rapid change of temperature test: -30°C to +85°C; 100 cycles; 15 minutes at Lower category temperature; 15 minutes at Upper category temperature. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 107 Temperature Cycling 1. Initial measure: Spec: refer Initial spec. 2. 100 Cycles (-30°C to +85°C), Soak Mode=1 (2 Cycle/hours). 3. Measurement at 24 ± 2Hours after test condition. No Visible Damage. Fulfill the electrical specification. JESD22 JA104 High Temperature Exposure 1. Initial measure: Spec: refer Initial spec. 2. Unpowered; 500hours @ T=+85°C . 3. Measurement at 24 ± 2 hours after test. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 108 Low Temperature Storage 1. Initial measure: Spec: refer Initial spec. 2. Unpowered: 500hours @ T= -30°C . 3. Measurement at 24 ± 2 hours after test. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 108 Solderability (SMD Bottom Side) Dipping method: a. Temperature: 235 ± 5°C b. Dipping time: 3 ± 0.5s The solder should cover over 95% of the critical area of bottom side. IEC 60384-21/22 4.10 Soldering Heat Resistance (RSH) Preheating temperature: 150 ± 10°C. Preheating time: 1~2 min. Solder temperature: 260 ± 5°C. Dipping time: 5 ± 0.5s No Visible Damage. IEC 60384-21/22 4.10 Vibration 5g's for 20 min., 12 cycles each of 3 orientations Note: Use 8"X5" PCB .031" thick 7 secure points on, one long side and 2 secure points at corners of opposite sides. Parts mounted within 2" from any secure point. Test from 10-2000 Hz. No Visible Damage.MIL-STD-202 Method 204 Mechanical Shock Three shocks in each direction shall be applied along the three mutually perpendicular axes of the test specimen (18 shocks) Peak value: 1,500g’s Duration: 0.5ms Velocity change: 15.4 ft/s Waveform: Half-sine No Visible Damage.MIL-STD-202 Method 213 Humidity Bias 1. Humidity: 85% R.H., Temperature: 85 ± 2 °C. 2. Time: 500 ± 24 hours. 3. Measurement at 24 ± 2hrs after test condition. No Visible Damage. Fulfill the electrical specification. MIL-STD-202 Method 106 Reliability Table HLX3216P2G45H5 Board Flex (SMD) 1. Mounting method: IR-Reflow. PCB Size (L:100 × W:40 × T:1.6mm) 2. Apply the load in direction of the arrow until bending reaches 2 mm. No Visible Damage. AEC-Q200 005 Adhesion Force of 1.8Kg for 60 seconds.No Visible Damage Magnification of 20X or greater may be employed for inspection of the mechanical integrity of the device body terminals and body/terminal junction. AEC-Q200 006 Physical Dimension Any applicable method using x10 magnification, micrometers, calipers, gauges, contour projectors, or other measuring equipment, capable of determining the actual specimen dimensions. In accordance with specification. JESD22 JB100 RevisionDate Content 1 2023/1/13 New issue Revision History HLX3216P2G45H5

ReportNo.:CISRR25122538901 Page 84 of 89 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR25122538901 Page 85 of 89 RadiatedSpuriousEmission(below1GHz)