2BBQ9-BBKSBluetooth Battery Kill Switch

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WuhuYoufanE-CommerceCo.,Ltd. FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 6/18/23 Towhomitmayconcern: We,WuhuYoufanE-CommerceCo.,Ltd.,herebycertifythattheequipmentforwhichauthorizationis sought(FCCID:2BBQ9-BBKS)isnot“covered”equipmentprohibitedfromreceivinganequipment authorizationpursuantto§2.903oftheFCCrules. Wealsocertifythat,asofthedateofthefilingoftheapplication,wearenotidentifiedontheCovered List(https://www.fcc.gov/supplychain/coveredlist)asanentityproducing“covered”equipment. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirements listedunder§2.911(b)and(d)(5)and(6). TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRas wellasKDB986446D01. Sincerely, Signature [Name]HongshengLiu [Title]Manager [Company] WuhuYoufanE-CommerceCo.,Ltd. 6 2 _ [ m o d e l ] C o v e r e d E q u _ 2 . 9 1 1 ( d ) ( 5 ) ( i ) a n d ( i i ) - U , V 0 3

Wuhu Youfan E-Commerce Co.,Ltd. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 6/26/2023 U.S. Agent Designation Wuhu Youfan E-Commerce Co.,Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: 2BBQ9-BBKS): Name and company of U.S. agent: STEYR INC Physical U.S. address of agent: 1312 17th Street #692, Denver, CO 80202, United States FRN of U.S. agent: 0033737586 Email address of U.S. agent: [email protected] STEYR INC acknowledges their obligation to accept service of process on behalf of Wuhu Youfan E- Commerce Co.,Ltd. Wuhu Youfan E-Commerce Co.,Ltd. with the FRN 0033909888 accepts its 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. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature [Name] Hongsheng Liu [Title] Manager [Company] Wuhu Youfan E-Commerce Co.,Ltd. Signature [Name of U.S. agent]Fairy Lee [Title of U.S. agent]manage [Company of U.S. agent]STEYR INC 48_[model] US_Agent_2.911(d)(7) - U, V05

WuhuYoufanE-CommerceCo.,Ltd. No.369industrialRoad,AnhuiXinwuEconomicDevelopmentZone(InFulongE- commerceIndustrialPark),WuhuCounty Date:2023.06.18 FCCIDNumber:2BBQ9-BBKS DearSir/Madam, We,shenzhenshishanpindianzishangwuyouxiangongsi,herebydeclaresthefollowing statementforFederalCommunicationsCommission,PCBboard,circuit,structureandinternal ofthesemodelnumbersarethesame.Allmodelnumbersaresameelectricallyidentical.Only modelnumberisdifferentforthesemodels: ProductName:BluetoothBatteryKillSwitch ModelNumbers: BBKS-2023-250A, BBKS-2023-200A, BBKS-2023-120A YoursSincerely, Name/Title： HongshengLiu/manager Company:WuhuYoufanE-CommerceCo.,Ltd. Address:No.369industrialRoad,AnhuiXinwuEconomicDevelopmentZone(In FulongE-commerceIndustrialPark),WuhuCounty Phone:0553-5011381 Fax:0553-5011381 E-Mail:[email protected]

CONFIDENTIALITYREQUEST forCertificationServiceinUSA FederalCommunicationCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21046 Date:<2023-06-18> PursuanttoParagraphs§0.457and0.459oftheCommission’sRules(47C.F.R.)and Section§552(b)(4)oftheFreedomofInformationAct,werequestsconfidentialityfor thefollowingproducts: FCCIDModelname 2BBQ9-BBKSBBKS-2023-250A Fortheproductstatedabove,werequestthatthefollowinginformationbeheld confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term ConfidentialityDays ExternalPhotos InternalPhotos BlockDiagram Schematics TestSetupPhotos User’sManual PartsList TuneUp OperationalDescriptions Thelong-termconfidentialityexhibitscontainourtradesecretsandproprietary informationthatcouldbeofbenefittoourcompetitors. Theshort-termconfidentialityonthebasisofensuringthatbusinesssensitive informationremainsconfidentialuntiltheactualmarketingofournewdevice. Ifyouhaveanyquestions,pleasefeelfreetocontactmeattheaddressshownbelow. Name/Title： HongshengLiu/manager Company:WuhuYoufanE-CommerceCo.,Ltd. Address:No.369industrialRoad,AnhuiXinwuEconomicDevelopmentZone(In FulongE-commerceIndustrialPark),WuhuCounty Phone:0553-5011381 Fax:0553-5011381 E-Mail:[email protected]

WuhuYoufanE-CommerceCo.,Ltd. No.369industrialRoad,AnhuiXinwuEconomicDevelopmentZone(InFulongE-commerce IndustrialPark),WuhuCounty FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 2023.06.18 Towhomitmayconcern: We,theundersigned,herebyauthorizeEurofinsProductServiceGmbHtoactonourbehalfinall mattersrelatingtoapplicationsforequipmentauthorizationFCCID:2BBQ9-BBKSincludingthe signingofalldocumentsrelatedtothesematters. AnyandallactscarriedoutbyEurofinsProductServiceGmbHonourbehalfshallhavethesame effectasactsofourown. Bysigningthisapplicationform,weagreetoEurofins’currentvalidGeneralTermsandConditions (AGB),TestingandCertificationRegulations(PZO)whichcanbeviewedonfollowingwebsite www.eurofins.de/eeorretrievedonrequest. Wealsoherebycertifythatnopartytothisapplicationissubjecttoadenialofbenefits,includingFCC benefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21U.S.C.862. Sincerely, Name/Title： HongshengLiu/manager Company:WuhuYoufanE-CommerceCo.,Ltd. Address:No.369industrialRoad,AnhuiXinwuEconomicDevelopmentZone(In FulongE-commerceIndustrialPark),WuhuCounty Phone:0553-5011381 Fax:0553-5011381 E-Mail:[email protected]

BluetoothBatteryKillSwitch FCCID:2BBQ9-BBKS BBKS-2023-250AExternalPhotographs

LabelandLabelLocation

BluetoothBatteryKillSwitch FCCID:2BBQ9-BBKS BBKS-2023-250AInternalPhotographs

1.MAXIMUMPERMISSIBLEEXPOSURE(MPE) 1.1ClientInformation ClientInformation Applicant:WuhuYoufanE-CommerceCo.,Ltd. Addressofapplicant:No.369industrialRoad,AnhuiXinwuEconomicDevelopment Zone(InFulongE-commerceIndustrialPark),WuhuCounty Manufacturer: WuhuYoufanE-CommerceCo.,Ltd. Addressofmanufacturer:No.369industrialRoad,AnhuiXinwuEconomicDevelopment Zone(InFulongE-commerceIndustrialPark),WuhuCounty GeneralDescriptionofEUT ProductName:BluetoothBatteryKillSwitch TradeName:/ ModelNo.:BBKS-2023-250A AddingModel(s):BBKS-2023-200A,BBKS-2023-120A RatedVoltage:DC12V PowerAdapterModel:/ Serialnumber: / FCCID: 2BBQ9-BBKS TechnicalCharacteristicsofEUT BluetoothVersion:V5.0BLE FrequencyRange:2402-2480MHz RFOutputPower:-4.15dBm DataRate:1Mbps Modulation:GFSK QuantityofChannels:40 ChannelSeparation:2MHz TypeofAntenna:PCB AntennaGain:1.9dBi 1.2StandardApplicable Accordingto§1.1307(b)(1)andKDB447498D01GeneralRFExposureGuidancev06,systemoperating undertheprovisionsofthissectionshallbeoperatinginamannerthatthepublicisnotexposedtoradio frequencyenergylevelinexcesslimitformaximumpermissibleexposure. (a)LimitsforOccupational/ControlledExposure Frequency range (MHz) ElectricField Strength(E) (V/m) MagneticField Strength(H) (A/m) PowerDensity (S)(mW/cm 2 ) Averaging Times|E| 2 ,|H | 2 orS (minutes) 0.3-3.06141.63(100)*6 3.0-301842/f4.89/f(900/f)*6 30-30061.40.1631.06 300-1500//F/3006 1500-100000//56 (b)LimitsforGeneralPopulation/UncontrolledExposure Frequency range (MHz) ElectricField Strength(E) (V/m) MagneticField Strength(H) (A/m) PowerDensity (S)(mW/cm 2 ) Averaging Times|E| 2 ,|H | 2 orS (minutes) 0.3-1.346141.63(100)*30 1.34-30824/f2.19/f(180/f)*30 30-30027.50.0730.230 300-1500//F/150030 1500-100000//130 Note:f=frequencyinMHz:*=Plane-waveequivalentspowerdensity 1.3MPECalculationMethod S=(30*P*G)/(377*R 2 ) S=powerdensity(inappropriateunits,e.g.,mw/cm 2 ) P=powerinputtotheantenna(inappropriateunits,e.g.,mw) G=powergainoftheantennainthedirectionofinterestrelativetoanisotropicradiator, thepowergainfactorisnormallynumericgain. R=distancetothecenterofradiationoftheantenna(inappropriateunits,e.g.,cm) 1.4MPECalculationResult Maximumpeakoutputpower:-4.15(dBm) Tune-Upoutputpower:-4(dBm),0.3981(mW) Predictiondistance:>20(cm) Predictionfrequency:2440(MHz) Antennagain:1.9(dBi) Directionalgain:1.48(numeric) Theworstcaseispowerdensityatpredictionfrequencyat20cm:0.00012(mw/cm 2 ) MPElimitforgeneralpopulationexposureatpredictionfrequency:1(mw/cm 2 ) 0.00012(mw/cm 2 )<1(mw/cm 2 ) SothetransmittercomplieswiththeRFexposurerequirementsandtheSARisnotrequired.

Product specification Quick Reference Date Antenna module on the system board Frequenc Range 2402 ~ 24888888 0MHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -1.2 (Input pwr – loss pwr) Peak EIRP(d Bm) 1.2 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) 6 0.2 % Gain (dBi) 1.2 (Avg Gain XY-plane) Maximum Power (dBm) 1.7 (XY-plane) Minimum Power (dBm) -4(XY-plane) Avg. Power (dBm) -0.5(XY-plane) Input Impendence(ohm) 50 Polarization Type V ertical & Horizontal V . S .W . R < 1.4 All the technical data and information contained herein are subject to change without prior notice Antenna Layout & module on the system board Antenna Gain Gain Table Unit in dBi @2.44GHz XY-plane XZ-plane YZ-plane Efficiency Peak Avg. Peak Avg. Peak Avg. Module Board 1.2 -0.51.9 -3.61.1 -3.06 0.2 % Retum Loss The Environment of Antenna Radiation Pattem 3D radiation pattern diagram XY-plane XZ-plane YZ-plane

WaltekTestingGroup(Shenzhen)Co.,Ltd. Http://www.waltek.com.cnPage 1 of 36 TESTREPORT ReferenceNo.......................:WTX23X06018267W001 FCCID....................................:2BBQ9-BBKS Applicant ...............................: WuhuYoufanE-CommerceCo.,Ltd. Address.................................: No.369industrialRoad,AnhuiXinwuEconomicDevelopmentZone(In FulongE-commerceIndustrialPark),WuhuCounty ProductName......................:BluetoothBatteryKillSwitch TestModel. ............................: BBKS-2023-250A Standards..............................:FCCPart15.247 DateofReceiptsample.....:June6,2023 DateofTest ...........................: June6~18,2023 DateofIssue........................:June18,2023 TestResult............................:Pass Remarks: Theresultsshowninthistestreportreferonlytothesample(s)tested,thistestreportcannotbe reproduced,exceptinfull,withoutpriorwrittenpermissionofthecompany.Thereportwouldbeinvalidwithout specificstampoftestinstituteandthesignaturesofcompilerandapprover. PreparedBy: WaltekTestingGroup(Shenzhen)Co.,Ltd. Address:1/F.,Room101,Building1,HongweiIndustrialPark,Liuxian2ndRoad, Block70Bao'anDistrict,Shenzhen,Guangdong,China Testedby:Approved&AuthorizedBy: JackHuangSilinChen ReferenceNo.:WTX23X06018267W001 WaltekTestingGroup(Shenzhen)Co.,Ltd. Http://www.waltek.com.cnPage 2 of 36 TABLEOFCONTENTS 1.GENERALINFORMATION...................................................................................................................................4 1.1PRODUCTDESCRIPTIONFOREQUIPMENTUNDERTEST(EUT).............................................................................4 1.2TESTSTANDARDS...................................................................................................................................................5 1.3TESTMETHODOLOGY.............................................................................................................................................5 1.4TESTFACILITY.......................................................................................................................................................5 1.5EUTSETUPANDTESTMODE................................................................................................................................6 1.6MEASUREMENTUNCERTAINTY..............................................................................................................................6 1.7TESTEQUIPMENTLISTANDDETAILS....................................................................................................................7 2.SUMMARYOFTESTRESULTS............................................................................................................................9 3.ANTENNAREQUIREMENT.................................................................................................................................10 3.1STANDARDAPPLICABLE.......................................................................................................................................10 3.2EVALUATIONINFORMATION.................................................................................................................................10 4.POWERSPECTRALDENSITY............................................................................................................................11 4.1STANDARDAPPLICABLE.......................................................................................................................................11 4.2TESTSETUPBLOCKDIAGRAM.............................................................................................................................11 4.3TESTPROCEDURE.................................................................................................................................................11 4.4SUMMARYOFTESTRESULTS/PLOTS....................................................................................................................11 5.DTSBANDWIDTH..................................................................................................................................................12 5.1STANDARDAPPLICABLE.......................................................................................................................................12 5.2TESTSETUPBLOCKDIAGRAM.............................................................................................................................12 5.3TESTPROCEDURE.................................................................................................................................................12 5.3SUMMARYOFTESTRESULTS/PLOTS....................................................................................................................12 6.RFOUTPUTPOWER.............................................................................................................................................13 6.1STANDARDAPPLICABLE.......................................................................................................................................13 6.2TESTSETUPBLOCKDIAGRAM.............................................................................................................................13 6.3TESTPROCEDURE.................................................................................................................................................13 6.4SUMMARYOFTESTRESULTS/PLOTS....................................................................................................................13 7.FIELDSTRENGTHOFSPURIOUSEMISSIONS..............................................................................................14 7.1STANDARDAPPLICABLE.......................................................................................................................................14 7.2TESTPROCEDURE.................................................................................................................................................14 7.3CORRECT…

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BluetoothBatteryKillSwitch FCCID:2BBQ9-BBKS BBKS-2023-250ATestSetupPhotos Radiatedemission30MHz~1GHz Radiatedemissionabove1GHz