2A8DO-S88TWS EARphone

Code:AB-RF-05-b ExternalPhotograph Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b

LabelLocationOnEUT Label FCCID:2A8DO-S88

Code:AB-RF-05-b InternalPhotograph Code:AB-RF-05-b Code:AB-RF-05-b Code:AB-RF-05-b ANT Code:AB-RF-05-b

version01 GuangzhouWesdarElectronicTechnologyCo.,Ltd DeclarationconcerningAntennaSpecification Itisherebydeclaredthattheproduct ModelNo.:TWS88,TWS181,S88 FCCID:2A8DO-S88 fulfillstherequirementinFCCtestrelatingtotheantennatype. ThedevicespecifiedaboveconfirmstotheFCCrecommendationsforinternalantennatype(s) describedbelow: ModelNo.ofantenna:N/A Typeofantenna:CeramicAntenna Gainoftheantenna:2.6dBi Frequencyrange:2402-2480MHzMHz Themountingoftheantennaisfixedtotheradiomoduleandnootherantennashouldbeused. Companyname:GuangzhouWesdarElectronicTechnologyCo.,Ltd Address:No.6,Industry1stRoad,ShangshaoVillage,XintangTown,Zengcheng District,Guangzhou,China City:Guangzhou ZIP/Postalcode:/ Country:China Place:GuangzhouDate:10/8/2022 Signature:

P/N: S1608ISMA02 REV:A0 SBR Communication has possession of proprietary information provided in this report and this proprietary information shall be kept in strict confidence and not disclosed to any person or firm without the prior written consent of SBR Communication Technology. 地址：深圳市宝安区西乡街道鹤州社区恒丰工业城B25栋二层 TEL: 0755-82790675, FAX: 0755-82809726 www.surbaner.com.cn 1 / 6  Features 1. Surface Mounted Devices with a small dimension of 1.6 x 0.8 x 0.8mm meet future miniaturization trend. 2. Embedded and LTCC (low temperature co-fired ceramic) technology is able to integrate with system design as well as beatifying the housing of final product. 3. High stability and low tolerance.  Applications 1. Bluetooth and Wireless LAN 2. ISM 2.4GHz in smart phone 3. PDA and other handheld devices. 4. ISM band 2.4GHz applications  Dimensions（Unit：mm） Symbols L W T A Dimensions 1.60±0.20 0.80±0.20 0.80±0.10 0.30±0.10 P/N: S1608ISMA02 REV:A0 SBR Communication has possession of proprietary information provided in this report and this proprietary information shall be kept in strict confidence and not disclosed to any person or firm without the prior written consent of SBR Communication Technology. 地址：深圳市宝安区西乡街道鹤州社区恒丰工业城B25栋二层 TEL: 0755-82790675, FAX: 0755-82809726 www.surbaner.com.cn 2 / 6  Evaluation Board and Matching Circuits P/N: S1608ISMA02 REV:A0 SBR Communication has possession of proprietary information provided in this report and this proprietary information shall be kept in strict confidence and not disclosed to any person or firm without the prior written consent of SBR Communication Technology. 地址：深圳市宝安区西乡街道鹤州社区恒丰工业城B25栋二层 TEL: 0755-82790675, FAX: 0755-82809726 www.surbaner.com.cn 3 / 6  Electrical Characteristics Item Feature Specification 1 Central frequency 2445MHz 2 Bandwidth >100MHz 3 Peak gain >3dBi 4 VSWR <2 5 Polarization Linear 6 Azimuth beamwidth Omnidirectional 7 Impedance 50 Ω NOTE: The specification is defined based on the test board dimension. (1) Smith Chart P/N: S1608ISMA02 REV:A0 SBR Communication has possession of proprietary information provided in this report and this proprietary information shall be kept in strict confidence and not disclosed to any person or firm without the prior written consent of SBR Communication Technology. 地址：深圳市宝安区西乡街道鹤州社区恒丰工业城B25栋二层 TEL: 0755-82790675, FAX: 0755-82809726 www.surbaner.com.cn 4 / 6 (2) S-Parameter (3) Radiation Pattern P/N: S1608ISMA02 REV:A0 SBR Communication has possession of proprietary information provided in this report and this proprietary information shall be kept in strict confidence and not disclosed to any person or firm without the prior written consent of SBR Communication Technology. 地址：深圳市宝安区西乡街道鹤州社区恒丰工业城B25栋二层 TEL: 0755-82790675, FAX: 0755-82809726 www.surbaner.com.cn 5 / 6 Y-Z Plane X-Z Plane P/N: S1608ISMA02 REV:A0 SBR Communication has possession of proprietary information provided in this report and this proprietary information shall be kept in strict confidence and not disclosed to any person or firm without the prior written consent of SBR Communication Technology. 地址：深圳市宝安区西乡街道鹤州社区恒丰工业城B25栋二层 TEL: 0755-82790675, FAX: 0755-82809726 www.surbaner.com.cn 6 / 6 X-Y Plane Frequency 2400MHz 2450MHz 2490MHz Avg. gain 1.20 0.90 0.35 Peak gain 2.6 2.6 2.4 Efficiency 62% 55% 52%  Dependability Test Test Temperature 25°C±3°C Operating Temperature -25°C~+85°C Temperature 5~+40°C Relative Humidity 20~70%HR

RFEXPOSUREEVALUATION FCCID:2A8DO-S88 AccordingtoFCC1.1310:Thecriterialistedinthefollowingtableshallbeused toevaluatetheenvironmentimpactofhumanexposuretoradiofrequency(RF) Radiationasspecifiedin§1.1307(b): RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,using measurementsorcomputersimulation.WhenroutineSARevaluationisnot required,portabletransmitterswithoutputpowergreaterthantheapplicable lowthresholdrequireSARevaluationtoqualifyforTCBapproval. Channel (MHz) Maximum output power (dBm) Tuneup tolerance (dBm) MaxTuneUp Power(dBm) Distance (mm) Calculation results Limit Operating Mode 2402-2.17-2.17 ±1 -1.1750.2373 GFSK2441-2.57-2.57 ±1 -1.5750.2183 2480-3.47-3.47±1-2.4750.1783 2402-1.1-1.1 ±1 -0.150.3033 π/4-DQPSK2441-1.49-1.49 ±1 -0.4950.2793 2480-2.34-2.34±1-1.3450.2313 Result:NoStandaloneSARtestisrequired.

Page 1 of 38 Appendix Test Data Report No.:18220WC20182701 Test Sample No.:1-2-2 Start Test Date:2022.8.11Finish Test Date:2022.8.16 Test Engineer:Auditor: Temperature:27.3 °C Relative Humidity: 47 % Pressure:1012 hPa Appendix A: 20dB Emission Bandwidth Test Result TestModeAntennaFrequency[MHz] 20db EBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict DH5Ant1 24020.8852401.545 2402.430------ 24410.8852440.545 2441.430------ 24800.8852479.545 2480.430------ 2DH5Ant1 24021.3132401.338 2402.650------ 24411.2802440.365 2441.645------ 24801.2782479.365 2480.643------ Page 2 of 38 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 Page 3 of 38 2DH5_Ant1_2402 2DH5_Ant1_2441 Page 4 of 38 2DH5_Ant1_2480 Page 5 of 38 Appendix B: Occupied Channel Bandwidth Test Result TestModeAntennaFrequency[MHz] OCB[MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict DH5Ant1 24020.85314 2401.5651 2402.4183------ 24410.86802 2440.5608 2441.4288------ 24800.87125 2479.5609 2480.4321------ 2DH5Ant1 24021.1914 2401.4001 2402.5915------ 24411.1849 2440.4031 2441.5880------ 24801.1795 2479.4050 2480.5845------ Page 6 of 38 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 Page 7 of 38 2DH5_Ant1_2402 2DH5_Ant1_2441 Page 8 of 38 2DH5_Ant1_2480 Page 9 of 38 Appendix C: Maximum conducted output power Test Result Peak Test Mode AntennaFrequency[MHz] Conducted Peak Power[dBm] Conducted Limit[dBm] Verdict DH5Ant1 2402-2.17≤20PASS 2441-2.57≤20PASS 2480-3.47≤20PASS 2DH5Ant1 2402-1.1≤20PASS 2441-1.49≤20PASS 2480-2.34≤20PASS Page 10 of 38 Test Graphs DH5_Ant1_2402 DH5_Ant1_2441 DH5_Ant1_2480 Page 11 of 38 2DH5_Ant1_2402 2DH5_Ant1_2441 Page 12 of 38 2DH5_Ant1_2480 Page 13 of 38 Appendix D: Carrier frequency separation Test Result TestModeAntennaFrequency[MHz]Result[MHz]Limit[MHz]Verdict DH5Ant1Hop1.005≥0.885PASS 2DH5Ant1Hop1.134≥0.875PASS Page 14 of 38 Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop Page 15 of 38 Appendix E: Time of occupancy Test Result TestModeAntennaFrequency[MHz] BurstWidth [ms] TotalHops [Num] Result[s]Limit[s]Verdict DH1Ant1Hop0.383170.12≤0.4PASS DH3Ant1Hop1.641600.262≤0.4PASS DH5Ant1Hop2.89960.277≤0.4PASS 2DH1Ant1Hop0.393130.122≤0.4PASS 2DH3Ant1Hop1.641720.282≤0.4PASS 2DH5Ant1Hop2.891100.318≤0.4PASS Page 16 of 38 Test Graphs DH1_Ant1_Hop DH3_Ant1_Hop Page 17 of 38 DH5_Ant1_Hop Page 18 of 38 2DH1_Ant1_Hop 2DH3_Ant1_Hop Page 19 of 38 2DH5_Ant1_Hop Page 20 of 38 Page 21 of 38 Appendix F: Number of hopping channels Test Result TestModeAntennaFrequency[MHz]Result[Num]Limit[Num]Verdict DH5Ant1Hop79≥15PASS 2DH5Ant1Hop79≥15PASS Page 22 of 38 Test Graphs DH5_Ant1_Hop 2DH5_Ant1_Hop Page 23 of 38 Appendix G: Band edge measurements Test Result TestModeAntennaChNameFrequency[MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5Ant1 Low2402-2.04-42.46≤-22.04 PASS High2480-3.38-55.58≤-23.38 PASS LowHop-2.21-49.27≤-22.21 PASS HighHop-4.00-60.27≤-24PASS 2DH5Ant1 Low2402-2.03-42.55≤-22.03 PASS High2480-3.27-56.88≤-23.27 PASS LowHop-3.32-57.41≤-23.32 PASS HighHop-3.56-59.15≤-23.56 PASS Page 24 of 38 Test Graphs DH5_Ant1_Low_2402 DH5_Ant1_High_2480 DH5_Ant1_Low_Hop Page 25 of 38 DH5_Ant1_High_Hop 2DH5_Ant1_Low_2402 Page 26 of 38 2DH5_Ant1_High_2480 2DH5_Ant1_Low_Hop 2DH5_Ant1_High_Hop Page 27 of 38 Page 28 of 38 Appendix H: Conducted Spurious Emission Test Result TestModeAntennaFrequency[MHz] FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5Ant1 2402 Reference-2.31-2.31---PASS 30~1000-2.31-62.06≤-22.31 PASS 1000~26500-2.31-28.45≤-22.31 PASS 2441 Reference-2.73-2.73---PASS 30~1000-2.73-62.25≤-22.73 PASS 1000~26500-2.73-27.85≤-22.73 PASS 2480 Reference-3.39-3.39---PASS 30~1000-3.39-62.42≤-23.39 PASS 1000~26500-3.39-27.99≤-23.39 PASS 2DH5Ant1 2402 Reference-1.99-1.99---PASS 30~1000-1.99-62.02≤-21.99 PASS 1000~26500-1.99-28.47≤-21.99 PASS 2441 Reference-2.45-2.45---PASS 30~1000-2.45-61.93≤-22.45 PASS 1000~26500-2.45-27.78≤-22.45 PASS 2480 Reference-3.39-3.39---PASS 30~1000-3.39-62.01≤-23.39 PASS 1000~26500-3.39-28.07≤-23.39 PASS Page 29 of 38 Test Graphs DH5_Ant1_2402_0~Reference DH5_Ant1_2402_30~1000 DH5_Ant1_2402_1000~26500 Page 30 of 38 DH5_Ant1_2441_0~Reference DH5_Ant1_2441_30~1000 Page 31 of 38 DH5_Ant1_2441_1000~26500 DH5_Ant1_2480_0~Reference DH5_Ant1_2480_30~1000 Page 32 of 38 DH5_Ant1_2480_1000~26500 2DH5_Ant1_2402_0~Reference Page 33 of 38 2DH5_Ant1_2402_30~1000 2DH5_Ant1_2402_1000~26500 2DH5_Ant1_2441_0~Reference Page 34 of 38 2DH5_Ant1_2441_30~1000 2DH5_Ant1_2441_1000~26500 Page 35 of 38 2DH5_Ant1_2480_0~Reference 2DH5_Ant1_2480_30~1000 2DH5_Ant1_2480_1000~26500 Page 36 of 38 Page 37 of 38 Appendix I: Duty Cycle Test Result TestModeAntenna Frequency[ MHz] ON Time [ms] Period [ms] Duty Cycle [%] Duty Cycle Factor[dB] DH5Ant124412.883.7576.801.15 2DH5Ant124412.893.7477.271.12 Page 38 of 38 Test Graphs DH5_Ant1_2441 2DH5_Ant1_2441 ---End---

ReportNo.:18220WC20182701FCCID:2A8DO-S88Page1of32 Code:AB-RF-05-b FCCTestReport ClientName: GuangzhouWesdarElectronicTechnology Co.,Ltd ClientAddress: No.6,Industry1stRoad,Shangshao Village,XintangTown,ZengchengDistrict, Guangzhou,China ProductName:TWSEARphone ReportDate:Oct.08,2022 ShenzhenAnbotekComplianceLaboratoryLimited ReportNo.:18220WC20182701FCCID:2A8DO-S88Page2of32 Code:AB-RF-05-b Contents 1.GeneralInformation ............................................................................................................................................6 1.1.ClientInformation ....................................................................................................................................6 1.2.DescriptionofDevice(EUT) ..................................................................................................................6 1.3.AuxiliaryEquipmentUsedDuringTest .................................................................................................7 1.4.DescriptionofTestConfiguration ..........................................................................................................7 1.5.DescriptionOfTestSetup ......................................................................................................................8 1.6.TestEquipmentList .................................................................................................................................9 1.7.MeasurementUncertainty ....................................................................................................................10 1.8.DescriptionofTestFacility ...................................................................................................................10 2.SummaryofTestResults .................................................................................................................................11 3.ConductedEmissionTest ................................................................................................................................12 3.1.TestStandardandLimit ........................................................................................................................12 3.2.TestSetup ...............................................................................................................................................12 3.3.TestProcedure .......................................................................................................................................12 3.4.TestData .................................................................................................................................................12 4.RadiationSpuriousEmissionandBandEdge .............................................................................................15 4.1.TestStandardandLimit ........................................................................................................................15 4.2.TestSetup ...............................................................................................................................................15 4.3.TestProcedure .......................................................................................................................................16 4.4.TestData .................................................................................................................................................17 5.MaximumPeakOutputPowerTest ...............................................................................................................25 5.1.TestStandardandLimit ........................................................................................................................25 5.2.TestSetup ...............................................................................................................................................25 5.3.TestProcedure .......................................................................................................................................25 5.4.TestData .................................................................................................................................................25 6.20DBOccupyBandwidthTest ........................................................................................................................26 6.1.TestStandard .........................................................................................................................................26 6.2.TestSetup ...............................................................................................................................................26 6.3.TestProcedure .......................................................................................................................................26 6.4.TestData .................................................................................................................................................26 7.CarrierFrequencySeparationTest ................................................................................................................27 7.1.TestStandardandLimit ........................................................................................................................27 7.2.TestSetup ...............................................................................................................................................27 7.3.TestProcedure .......................................................................................................................................27 7.4.TestData .................................................................................................................................................27 8.NumberofHoppingChannelTest ..................................................................................................................28 8.1.TestStandardandLimit .......................................................................…

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Code:AB-RF-05-b TestSetupPhotograph PhotoofConductedEmissionMeasurement PhotoofRadiationEmissionTest Code:AB-RF-05-b