2BSR6-SR116Smart ring

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 2BSR6-SR116 SR116, SR117 We, Applicant Company Name: Shenzhen Huadu Technology Co., Ltd. Address: No. 6, Chengde Lanyuan Industrial Park, 4th Floor, Building C, 401, Tongfu Industrial Zone, Gukeng Sub-rict, Longhua District, Shenzhen City, China Phone: +86-13538214502 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. 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, 2026-07-28 Signature Date Name / Title: Chunhua Zeng / Manager Company: Shenzhen Huadu Technology Co., Ltd. Address: No. 6, Chengde Lanyuan Industrial Park, 4th Floor, Building C, 401, Tongfu Industrial Zone, Gukeng Sub-rict, Longhua District, Shenzhen City, China Phone: +86-13538214502 Fax: +86-13538214502 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 2BSR6-SR116 SR116, SR117 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 Global Test Service Co., Ltd. Contact Name: Peter Xiao Address: No.7-101 and 8A-104, Building 7 and 8, DCC Cultural and Creative Garden, No.98, Pingxin North Road, Shangmugu Community, Pinghu Street, Longgang District, Shenzhen, Guangdong, China Phone: +86-755-28717088 Email: [email protected] Date: 2026-07-23 Signature:

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 2BSR6-SR116 SR116, SR117 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 Procedure 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, 2026-07-28 Signature Date Name / Title: Chunhua Zeng / Manager Company: Shenzhen Huadu Technology Co., Ltd. Address: No. 6, Chengde Lanyuan Industrial Park, 4th Floor, Building C, 401, Tongfu Industrial Zone, Gukeng Sub-rict, Longhua District, Shenzhen City, China Phone: +86-13538214502 Fax: +86-13538214502 E-Mail: [email protected]

Shenzhen Huadu Technology Co., Ltd. No. 6, Chengde Lanyuan Industrial Park, 4th Floor, Building C, 401, Tongfu Industrial Zone, Gukeng Sub-rict, Longhua District, Shenzhen City, China Date: July 28, 2026 FCC ID: 2BSR6-SR116 Model Number: SR116, SR117 To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, Shenzhen Huadu Technology Co., Ltd. hereby declare that our product (Smart ring) Model Number: SR116, SR117 board, Schematic, Hardware version, Software version, structure and internal photos are same, Model named differently due to marketing purposes. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely, (Signed) Name / Title: Chunhua Zeng / Manager Company: Shenzhen Huadu Technology Co., Ltd. Address: No. 6, Chengde Lanyuan Industrial Park, 4th Floor, Building C, 401, Tongfu Industrial Zone, Gukeng Sub-rict, Longhua District, Shenzhen City, China Phone: +86-13538214502 Fax: +86-13538214502 E-Mail: [email protected]

FCCID:2BSR6-SR116 Fig.1 Fig.2 FCCID:2BSR6-SR116 Fig.3 Fig.4 FCCID:2BSR6-SR116 Fig.5 Fig.6 FCCID:2BSR6-SR116 Fig.7

_____________________________________________________________________________________________________ LABELANDLOCATION (Size:L1.00cmx0.3cm) productname：Smartring Model：SR116 FCCID:2BSR6-SR116 LabelLocation

FCCID:2BSR6-SR116 Fig.1 Fig.2 FCCID:2BSR6-SR116 Fig.3 BTANT

ShenzhenGlobalTestServiceCo.,Ltd. RoomNo.101,Building1,andRoomNo.101,Building3,No.88JinkangRoad,JinshaCommunity, KengziSub-district,PingshanDistrict,ShenzhenCity,Guangdong,China RFExposureevaluation ReportReferenceNo........................: FCCID..................................................: GTS20260714010-1-02 2BSR6-SR116 Compiledby (position+printedname+signature)..:FileadministratorsJinghuaXiao Supervisedby (position+printedname+signature)..:TestEngineerEvanOuyang Approvedby (position+printedname+signature) .. : ManagerJasonHu Dateofissue.........................................:Jul.23,2026 RepresentativeLaboratoryName . :ShenzhenGlobalTestServiceCo.,Ltd. Address ................................................. : RoomNo.101,Building1,andRoomNo.101,Building3,No.88 JinkangRoad,JinshaCommunity,KengziSub-district,Pingshan District,ShenzhenCity,Guangdong,China,China Applicant’sname ............................... :ShenzhenHuaduTechnologyCo.,Ltd. Address.................................................: No.6,ChengdeLanyuanIndustrialPark,4thFloor,BuildingC,401, TongfuIndustrialZone,GukengSub-rict,LonghuaDistrict, ShenzhenCity,China Testspecification..............................: Standard ................................................ : 47CFR§1.1310 47CFR§2.1093 KDB447498D01GeneralRFExposureGuidancev06 TRFOriginator......................................:ShenzhenGlobalTestServiceCo.,Ltd. MasterTRF...........................................:Dated2014-12 ShenzhenGlobalTestServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenGlobalTestServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthematerial. ShenzhenGlobalTestServiceCo.,Ltd.takesnoresponsibilityforandwillnotassumeliabilityfordamages resultingfromthereader'sinterpretationofthereproducedmaterialduetoitsplacementandcontext. Testitemdescription........................:Smartring TradeMark............................................: N/A Manufacturer ......................................... :ShenzhenHuaduTechnologyCo.,Ltd. Model/Typereference ......................... :SR116 ListedModels......................................: SR117 Exposurecategory...............................:Generalpopulation/uncontrolledenvironment EUTType .............................................. :Portable HardwareVersion ............................... :N/A SoftwareVersion..................................: N/A Rating ..................................................... :DC3.7VFrombatteryandDC5.0VFromexternalcircuit Result ..................................................... :PASS ReportNo.:GTS20260714010-1-02Page 2 of 7 TESTREPORT TestReportNo.: GTS20260714010-1-02 Jul.23,2026 ______________________________________________________________________________________________ Dateofissue EquipmentunderTest:Smartring Model/Type:SR116 Listedmodel:SR117 Applicant : ShenzhenHuaduTechnologyCo.,Ltd. Address : No.6,ChengdeLanyuanIndustrialPark,4thFloor,BuildingC, 401,TongfuIndustrialZone,GukengSub-rict,LonghuaDistrict, ShenzhenCity,China Manufacturer : ShenzhenHuaduTechnologyCo.,Ltd. Address : No.6,ChengdeLanyuanIndustrialPark,4thFloor,BuildingC, 401,TongfuIndustrialZone,GukengSub-rict,LonghuaDistrict, ShenzhenCity,China TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:GTS20260714010-1-02Page 3 of 7 Contents 1.SUMMARY...............................................................................................................................................4 1.1.ProductDescription....................................................................................................................................4 2.TESTENVIRONMENT.......................................................................................................................5 2.1.Addressofthetestlaboratory...................................................................................................................5 2.2.TestFacility..................................................................................................................................................5 2.3.Environmentalconditions...........................................................................................................................5 2.4.Statementofthemeasurementuncertainty.............................................................................................5 3.METHODOFMEASUREMENT.....................................................................................................6 3.1.ApplicableStandard....................................................................................................................................6 3.2.EvaluationMethodandLimit......................................................................................................................6 4.CONDUCTEDPOWERRESULTS...............................................................................................7 5.MANUFACTURINGTOLERANCE...............................................................................................7 6.EVALUATIONRESULTS.................................................................................................................7 6.1.StandaloneEvaluation................................................................................................................................7 7.CONCLUSION........................................................................................................................................7 ReportNo.:GTS20260714010-1-02Page 4 of 7 1.SUMMARY 1.1.ProductDescription ProductName:Smartring TradeMark:N/A Model/Typereference:SR116 ListModel:SR117 ModelDeclaration PCBboard,structureandinternalofthesemodel(s)arethesame,Only themodelnamedifferent,Sonoadditionalmodelsweretested. Powersupply:DC3.7VFrombatteryandDC5.0VFromexternalcircuit HardwareVersionN/A So…

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SR100 Antenna Test Report Customer健云互联 ProjectSR100 Antenna BANDBT Product Description2012-X5 Product NoV1.0 Product Overview & Dimension Shenzhen Niyi Technology Co., Ltd Dimension (mm) L 3.23 ± 0.20 W 1.66 ± 0.20 T 1.23 ± 0.20 3 Shenzhen Niyi Technology Co., Ltd This report is to measure the performance of BT antenna for RS01Z.The antennaoperating frequency at (2400-2500MHZ) , All test data are showed as below. Content 1. Product Overview & Dimension 2. Test system 3. Antenna Matching Network 4. Test Result 4.1 S11 Parameter 4.2 Gain & Efficiency 4.3 Test coordinate 4.4 2D Pattern 4.5 OTA Data 4.6 BT Boot measured 5. Antenna Assembly & environmental processing 4 Shenzhen Niyi Technology Co., Ltd 2.Test System Sequence Number Test Itemequipment S parameterVSWR Agilent 5071C & HP 8753 OTA TestTRP&TISCMW500 &CMW270 ETS& FT SG24 Gain & Efficiency Gain & Efficiency ETS&FT SG24 Agilent 5071C Test Result Sample status & coordinates Shenzhen Niyi Technology Co., Ltd 深圳市合拓科技有限公司 Match network parameters 1.8pF 5.6nH 2012-X5 S11 Shenzhen Niyi Technology Co., Ltd Frequency (MHz) 240024502500 Smith47.2249.8550.27 Log mag -18.58-17.96-15.59 VSWR1.271.281.39 OTA DATA-BT ANT Shenzhen Niyi Technology Co., Ltd Shenzhen Niyi Technology Co., Ltd 3D Pattern OTA DATA-BT ANT OTA DATA Shenzhen Niyi Technology Co., Ltd Thanks for your comment! Shenzhen Niyi Technology Co., Ltd 1202B, Building C6, Hengfeng Industrial City, Xixiang, Bao'an District, Shenzhen HZL:18927402110 Shenzhen Niyi Technology Co., Ltd

FCCID:2BSR6-SR116 1 CaseNo.:GTS20260714010-1-01 AmbientCondition:24°C,47%RH AccordingStandard:■Part15C TestDate:2026.7.16-2026.7.22TestEngineer:Evanouyang AppendixA.1:DTSBandwidth TestResult TestModeAntennaFreq(MHz) DTSBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict BLEAnt1 24020.6602401.6802402.3400.5PASS 24400.6962439.6482440.3440.5PASS 24800.6842479.6682480.3520.5PASS FCCID:2BSR6-SR116 2 TestGraphs BLE_Ant1_2402 BLE_Ant1_2440 BLE_Ant1_2480 FCCID:2BSR6-SR116 3 FCCID:2BSR6-SR116 4 AppendixA.2:OccupiedChannelBandwidth TestResult TestModeAntennaFreq(MHz) OCB[MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict BLEAnt1 24021.02112401.49522402.5163------ 24401.02992439.49292440.5228------ 24801.03182479.48922480.5210------ FCCID:2BSR6-SR116 5 TestGraphs BLE_Ant1_2402 BLE_Ant1_2440 BLE_Ant1_2480 FCCID:2BSR6-SR116 6 FCCID:2BSR6-SR116 7 AppendixA.3:Maximumconductedoutputpower TestResultPeak TestModeAntennaFreq(MHz) ConductedPeak Powert[dBm] Conducted Limit[dBm] Verdict BLEAnt1 24020.74≤30PASS 24402.47≤30PASS 24800.77≤30PASS FCCID:2BSR6-SR116 8 AppendixA.4:Maximumpowerspectraldensity TestResult TestModeAntennaFreq(MHz)Result[dBm/3kHz]Limit[dBm/3kHz]Verdict BLEAnt1 2402-15.80≤8.00PASS 2440-14.06≤8.00PASS 2480-15.78≤8.00PASS FCCID:2BSR6-SR116 9 TestGraphs BLE_Ant1_2402 BLE_Ant1_2440 BLE_Ant1_2480 FCCID:2BSR6-SR116 10 FCCID:2BSR6-SR116 11 AppendixA.5:Bandedgemeasurements TestResult TestMod e Antenn a ChNam e Freq(MHz ) RefLevel[dBm ] Result[dBm ] Limit[dBm ] Verdic t BLEAnt1 Low24020.02-49.75≤-19.98PASS High2480-0.41-48.89≤-20.41PASS FCCID:2BSR6-SR116 12 TestGraphs BLE_Ant1_Low_2402 BLE_Ant1_High_2480 FCCID:2BSR6-SR116 13 AppendixA.6:ConductedSpuriousEmission TestResult TestModeAntennaFreq(MHz) FreqRange [MHz] RefLevel [dBm] Result[dBm]Limit[dBm]Verdict BLEAnt1 2402 Reference-0.05-0.05---PASS 30~1000-0.05-60.52≤-20.05PASS 1000~26500-0.05-47.61≤-20.05PASS 2440 Reference1.701.70---PASS 30~10001.70-59.88≤-18.3PASS 1000~265001.70-47.36≤-18.3PASS 2480 Reference0.000.00---PASS 30~10000.00-59.6≤-20PASS 1000~265000.00-47.29≤-20PASS FCCID:2BSR6-SR116 14 TestGraphs BLE_Ant1_2402_0~Reference BLE_Ant1_2402_30~1000 BLE_Ant1_2402_1000~26500 FCCID:2BSR6-SR116 15 BLE_Ant1_2440_0~Reference BLE_Ant1_2440_30~1000 FCCID:2BSR6-SR116 16 BLE_Ant1_2440_1000~26500 BLE_Ant1_2480_0~Reference BLE_Ant1_2480_30~1000 FCCID:2BSR6-SR116 17 BLE_Ant1_2480_1000~26500 FCCID:2BSR6-SR116 18 AppendixA.7:DutyCycle TestResult TestModeAntennaFreq(MHz) ON Time [ms] Period [ms] XDC [%] Duty Cycle Factor[dB] 1/T Factor[KHz] BLEAnt1 24022.132.500.852085.200.700.47 24402.122.500.848084.800.720.47 24802.132.500.852085.200.700.47 FCCID:2BSR6-SR116 19 TestGraphs BLE_Ant1_2402 BLE_Ant1_2440 BLE_Ant1_2480 FCCID:2BSR6-SR116 20 FCCID:2BSR6-SR116 21 AppendixA.8:EmissionsinRestrictedBands TestResult TestModeAntennaChName Freq(MH z) Detector Freq [MHz] Result [dBm] Limit [dBm] Result [dBuV/m] Limit [dBuV/m] Verdict BLEAnt1 Low2402 AV2310.000-49.26≤-41.2045.94≤54PASS AV2381.585-48.82≤-41.2046.38≤54PASS AV2390.000-49.08≤-41.2046.12≤54PASS Peak2310.000-42.4≤-21.2052.80≤74PASS Peak2382.110-39.35≤-21.2055.85≤74PASS Peak2390.000-41.48≤-21.2053.72≤74PASS High2480 AV2483.500-48.17≤-41.2047.03≤54PASS AV2483.520-48.17≤-41.2047.03≤54PASS AV2500.000-48.34≤-41.2046.86≤54PASS Peak2483.500-41.41≤-21.2053.79≤74PASS Peak2486.400-39.28≤-21.2055.92≤74PASS Peak2500.000-41.17≤-21.2054.03≤74PASS Note： 1.TheAntennaGainiscompensatedinthegraph. 2.TheDutyCycleFactorandRBWFactoriscompensatedinthegraph. 3.ThelimitindBmforaveragedetectorisconversionfrom54dBuV/m,accordingto15.209(a).Thelimit indBmforpeakdetectoris20dBabovethelimitofaveragedetectorindBm. FCCID:2BSR6-SR116 22 TestGraphs BLE_Ant1_Low_2402_AV BLE_Ant1_Low_2402_Peak BLE_Ant1_High_2480_AV FCCID:2BSR6-SR116 23 BLE_Ant1_High_2480_Peak

ShenzhenGlobalTestServiceCo.,Ltd. RoomNo.101,Building1,andRoomNo.101,Building3,No.88JinkangRoad,JinshaCommunity, KengziSub-district,PingshanDistrict,ShenzhenCity,Guangdong,China FCCPART15SUBPARTCTESTREPORT FCCPART15.247 ReportReferenceNo........................: FCCID.................................................: GTS20260714010-1-01 2BSR6-SR116 Compiledby (position+printedname+signature) .. :FileadministratorsJinghuaXiao Supervisedby (position+printedname+signature) .. :TestEngineerEvanOuyang Approvedby (position+printedname+signature)..: ManagerJasonHu Dateofissue.........................................:Jul.23,2026 RepresentativeLaboratoryName.:ShenzhenGlobalTestServiceCo.,Ltd. Address ................................................. : RoomNo.101,Building1,andRoomNo.101,Building3,No.88 JinkangRoad,JinshaCommunity,KengziSub-district,Pingshan District,ShenzhenCity,Guangdong,China Applicant’sname...............................:ShenzhenHuaduTechnologyCo.,Ltd. Address ................................................. : No.6,ChengdeLanyuanIndustrialPark,4thFloor,BuildingC,401, TongfuIndustrialZone,GukengSub-rict,LonghuaDistrict,Shenzhen City,China Testspecification..............................: Standard ................................................ :FCCPart15.247 TRFOriginator......................................:ShenzhenGlobalTestServiceCo.,Ltd. MasterTRF...........................................:Dated2014-12 ShenzhenGlobalTestServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongastheShenzhen GlobalTestServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthematerial.Shenzhen GlobalTestServiceCo.,Ltd.takesnoresponsibilityforandwillnotassumeliabilityfordamagesresultingfrom thereader'sinterpretationofthereproducedmaterialduetoitsplacementandcontext. Testitemdescription........................:Smartring TradeMark............................................:N/A Manufacturer.........................................:ShenzhenHuaduTechnologyCo.,Ltd. Model/Typereference ......................... :SR116 ListedModels ...................................... :SR117 ModulationType .................................. :GFSK OperationFrequency..........................:From2402MHzto2480MHz HardwareVersion...............................:N/A SoftwareVersion..................................:N/A Rating ..................................................... :DC3.7VFrombatteryandDC5.0VFromexternalcircuit Result ..................................................... :PASS ReportNo.:GTS20260714010-1-01Page 2 of 32 TESTREPORT TestReportNo.: GTS20260714010-1-01 Jul.23,2026 ______________________________________________________________________________________________ Dateofissue EquipmentunderTest:Smartring Model/Type : SR116 Listedmodel : SR117 Applicant : ShenzhenHuaduTechnologyCo.,Ltd. Address: No.6,ChengdeLanyuanIndustrialPark,4thFloor,BuildingC,401, TongfuIndustrialZone,GukengSub-rict,LonghuaDistrict,Shenzhen City,China Manufacturer : ShenzhenHuaduTechnologyCo.,Ltd. Address: No.6,ChengdeLanyuanIndustrialPark,4thFloor,BuildingC,401, TongfuIndustrialZone,GukengSub-rict,LonghuaDistrict,Shenzhen City,China TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:GTS20260714010-1-01Page 3 of 32 Contents 1.TESTSTANDARDS.........................................................................................................................................4 2.SUMMARY.......................................................................................................................................................5 2.1.GeneralRemarks...................................................................................................................................5 2.2.ProductDescription................................................................................................................................5 2.3.EquipmentUnderTest............................................................................................................................5 2.4.ShortdescriptionoftheEquipmentunderTest(EUT)...........................................................................5 2.5.EUToperationmode..............................................................................................................................5 2.6.BlockDiagramofTestSetup..................................................................................................................6 2.7.EUTExerciseSoftware..........................................................................................................................6 2.8.SpecialAccessories...............................................................................................................................6 2.9.ExternalI/OCable..................................................................................................................................7 2.10.RelatedSubmittal(s)/Grant(s)............................................................................................................7 2.11.Modifications.........................................................................................................................................7 3.TESTENVIRONMENT.....................................................................................................................................8 3.1.Addressofthetestlaboratory................................................................................................................8 3.2.TestFacility.............................................................................................................................................8 3.3.Environmentalconditions.......................................................................................................................8 3.4.Statementofthemeasurementuncertainty.............…

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FCCID:2BSR6-SR116 _______________________________________________________________________________________________ Page1of2 1.TESTSETUPPHOTOGRAPHS PhotoofRadiatedEmissionsMeasurement Fig.1 Fig.2 FCCID:2BSR6-SR116 _______________________________________________________________________________________________ Page2of2 Fig.3 PhotoofConductedEmissionMeasurement Fig.4