2AG2K-BEL497KeyVibe

(A&HDesignGroup,Ltd.) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:2024-9-2 FCCID:2AG2K-BEL497 Ref.#1:AttestationStatementsPart2.911(d)(5)(i)Filing (A&HDesignGroup,Ltd.)certifiesthattheequipmentforwhichauthorizationissoughtis not“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. Ref.#2:AttestationStatementsPart2.911(d)(5)(ii)Filing ( A&HDesignGroup,Ltd. )certifiesthat,asofthedateofthefilingoftheapplication,the applicantisnotidentifiedontheCoveredListasanentityproducing“covered” equipment. Applicant:A&HDesignGroup,Ltd. Address:Suite608,TowerOne,HarbourCentre,1HokCheungStreet,HungHom,Kowloon, HongKong 2024-9-2 ContactPerson:ThomasCheung Tel.:00852-23349488 Email:[email protected] Sincerely, Signature:

C5266091_X23_Ed.1 1/1 US AGENT LETTER OF ATTESTATION US Agent: Company Name: Bellesa Enterprises US Inc. Contact Name: Nikki Hoppenheim Address: 22647 Ventura Blvd#183, Woodland Hills, CA 91364, United States Telephone No: (514)706-4554 Email: [email protected] FRN: 0033124264 TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 This letter is to confirm that we have accepted the responsibility to act as US agent representative on behalf of the A&H Design Group, Ltd. As per US agent, we are aware of the requirements involved as outlined in FCC Equipment Authorization Program in their Report and Order FCC 22-84 and the clause § 2.911 Application requirements. Applicant Company name: A&H Design Group, Ltd. FRN: 0034346247 Grantee code: 2AG2K FCC ID: 2AG2K-BEL497 Contact Name: Thomas Cheung Address: Suite 608, Tower One, Harbour Centre1 Hok Cheung Street, Hung Hom, Kowloon, Hong Kong Telephone No: 00852-23349488 Fax No: 00852-23349488 Email: [email protected] The Applicant acknowledge the acceptance of 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. Date: 2024/8/29 Applicant’s Name: Thomas Cheung US Agent’s Name: Nikki Hoppenheim Title: Manager Title: VP Operations Signature Thomas Cheung Signature Nikki Hoppenheim

A&HDesignGroup,Ltd. Date ： 2024-9-2 ProductModelNumber:BEL497 FCCID：2AG2K-BEL497 Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatORGANIZATION.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyORGANIZATION.onourbehalf shallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite Title:ThomasCheung Email:[email protected] Telephone:00852-23349488 Onbehalfof:A&HDesignGroup,Ltd.

A&HDesignGroup,Ltd. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:September2,2024 Subject;RequestforConfidentiality FCCID:2AG2K-BEL497 ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure SoftwareSecurityRequirementsforUNIIdevices Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:ThomasCheung Title:Manager

PCB Antenna Specification Summary ITEMANT SPEC Model Name 433.92MHz ANT HorizontalVertical 420.00MHz 433.92MHz 450.00MHz420.00MHz433.92MHz 450.00MHz Center Frequency -1.73 -0.84 -0.68 -6.15 -3.70 -2.32 MAX. Gain -0.68 PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 Ohm Antenna Length 38.20mm Manufacture Dongguan Youjie Electronic Co,.Ltd. Antenna Photo & Length (mm) Room 101, No.9 Guangyun Middle Road, Changping Town, Dongguan City, Guangdong Province Horizontal: 420.00 M Hz 433.92 MHz 450.00 MHz Power (dBm) M ax: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) MaxMinAvg 43 3.52-1.73178-30.0815-8.48713 43 3.92-0.845801-38.5605-7.88012 43 4.32-0.685586-24.0318-6.79139 Vertical: 433.52 MHz 433.92 MHz 434.32 MHz Power (dBm) M ax: 0 Min: -30 Scale: 5/div Gain(d B) Frequency (MHz) MaxMinAvg 4 33.52-6.1530-24.1420-13.0295 4 33.92-3.7054-26.5836-10.6700 4 34.32-2.32122-30.4301-9.70536 ANT Test Labs：Shenzhen RFI-LAB Communication Techno logy Co., Ltd.

AnnexA ExternalPhotos TestModelNo.:BEL497Page1of4 TestModelNo.:BEL497Page2of4 TestModelNo.:BEL497Page3of4 TestModelNo.:BEL497Page4of4

AnnexB Internalphotos TestModelNo.:BEL497Page1of3 TestModelNo.:BEL497Page2of3 TestModelNo.:BEL497Page3of3 PCBAntenna

BSLTestingCo.,Ltd.FCCID:2AG2K-BEL497 RFExposureEvaluation 1.ThecorrespondingSARExclusionThresholdcondition,listedbelow: 1)The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparationdistances≤50 mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)].[Vf(GHz)]≤3.0for1-gSARand≤7.5for10-gextremitySAR,16where ➢f(GHz)istheRFchanneltransmitfrequencyinGHz ➢PoweranddistanceareroundedtothenearestmWandmmbeforecalculation ➢Theresultisroundedtoonedecimalplaceforcomparison Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mmandfor transmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtestseparationdistanceis<5 mm,adistanceof5mmisappliedtodetermineSARtestexclusion. 2)At100MHzto6GHzandfortestseparationdistances>50mm,theSARtestexclusionthresholdis determinedaccordingtothefollowing: a)[Thresholdat50mminstep1)+(testseparationdistance-50mm):(f(MHz)/150)]mW,at100MHz to1500MHz b)[Thresholdat50mminstep1)+(testseparationdistance-50mm)-10]mWat>1500MHzand≤ 6GHz 3)Atfrequenciesbelow100MHz,thefollowingmaybeconsideredforSARtestexclusion. a)Thethresholdatthecorrespondingtestseparationdistanceat100MHzinstep2)ismultipliedby [1+log(100/f(MHz))]fortestseparationdistances>50mmand<200mm. b)Thethresholddeterminedbytheequationina)for50mmand100MHzismultipliedby/2fortest separationdistances≤50mm. c)SARmeasurementproceduresarenotestablishedbelow100MHz.WhenSARtestexclusioncannot beapplied,aKDBinquiryisrequiredtodetermineSARevaluationrequirementsforanytestresultstobe acceptable. 2.CLASSIFICATION Theantennaofthisproduct,undernormalusecondition,isatlessthan20cmawayfromthebodyofthe user.So,thisdeviceisclassifiedasPortableDevice. EUTSpecification FCCID2AG2K-BEL497 PRODUCT:KeyVibe MODELNO.:BEL497 STANDARDS:FCCPart15.231 KDB447498D01V06 ANSIC95.1-1999 FCC§1.1310 Antennatype:PCBAntenna Antennagain(Max)-0.68dBi EvaluationappliedMPEEvaluation SAREvaluation BSLTestingCo.,Ltd.FCCID:2AG2K-BEL497 3.SARTESTEXCLUSIONTHRESHOLDS ThemeasuredconductedPKPower Mode Frequency(MHz)Fieldstrength(dBuV/m@3) EIRP(dBm) TX433.9266.96-28.2 Note: EIRP=E Meas +20log(d Meas )-104.7 EIRPistheequivalentisotropicallyradiatedpower,indBm E Meas isthefieldstrengthoftheemissionatthemeasurementdistance,indBuV/m d Meas isthemeasurementdistance,inm EIRP=E+20log(d)-104.7=66.96+9.54-104.7=-28.2dBm ThetunedconductedPKPower(declaredbyclient) Mode Frequency(MHz)TargetPower (dBm) Tolerance ±(dBm) TX433.92-281 Frequency (MHz) Minimum Separation distance(mm) RFOutputpowerResultLimit for1-g SAR Verdict (dBm)(mW) 433.925-270.0020.0002253.0 Exempt from SAR Conclusion ThereforethisdevicecomplieswithFCC'sRFradiationexposurelimitsforgeneralpopulationwithout SARevaluation.

BSLTestingCo.,Ltd.ReportNo.:BSL24050025P01-R01 Page 1 of27 FCCPART15SUBPARTCTESTREPORT FCCPART15.231 ReportReferenceNo........................:BSL24050025P01-R01 FCCID.................................................:2AG2K-BEL497 Compiledby (position+printedname+signature)..: Engineer/CindyZheng Supervisedby (position+printedname+signature) .. : Manager/HaleyWen Approvedby (position+printedname+signature)..: RFManager/VivianJiang Dateofissue ......................................... :May17,2024 TestingLaboratoryName .............. :BSLTestingCo.,Ltd. Address.................................................: 1/F,BuildingB,XinshidaiGRPark,ShiyanStreet,Bao'anDistrict, Shenzhen,Guangdong,518052,People’sRepublicofChina Applicant’sname ............................... : A&HDesignGroup,Ltd. Address.................................................: Suite608,TowerOne,HarbourCentre,1HokCheungStreet, HungHom,Kowloon,HongKong Testspecification..............................: Standard ................................................ : FCCPart15.231 BSLTestingCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongastheBSL TestingCo.,Ltd.isacknowledgedascopyrightownerandsourceofthematerial.BSLTestingCo.,Ltd. takesnoresponsibilityforandwillnotassumeliabilityfordamagesresultingfromthereader'sinterpretation ofthereproducedmaterialduetoitsplacementandcontext. Testitemdescription........................:KeyVibe TradeMark............................................:bellesa Manufacturer ......................................... :A&HDesignGroup,Ltd. Model/Typereference ......................... :BEL497 ListedModels ...................................... :N/A Ratings...................................................:DC3.7VFromBatteryorDC5VbyUSBport Modulation...........................................:ASK Frequency..............................................433.92MHz Result ..................................................... :PASS BSLTestingCo.,Ltd.ReportNo.:BSL24050025P01-R01 Page 2 of27 TESTREPORT Equipmentunder Test : KeyVibe Model/Type: BEL497 ListedModels:N/A ModelDeclaration:N/A Applicant: A&HDesignGroup,Ltd. Address: Suite608,TowerOne,HarbourCentre,1HokCheungStreet,Hung Hom,Kowloon,HongKong Manufacturer: A&HDesignGroup,Ltd. Address: Suite608,TowerOne,HarbourCentre,1HokCheungStreet,Hung Hom,Kowloon,HongKong TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. BSLTestingCo.,Ltd.ReportNo.:BSL24050025P01-R01 Page 3 of27 Contents 1TESTSTANDARDS..............................................................................................................................4 2SUMMARY.................................................................................................................................................5 2.1GeneralRemarks..........................................................................................................................................5 2.2ProductDescription.....................................................................................................................................5 2.3EquipmentUnderTest.................................................................................................................................5 2.4ShortdescriptionoftheEquipmentunderTest(EUT).............................................................................5 2.5BlockDiagramofTestSetup.......................................................................................................................5 2.6SpecialAccessories.....................................................................................................................................6 2.7RelatedSubmittal(s)/Grant(s)...................................................................................................................6 2.8Modifications.................................................................................................................................................6 3TESTENVIRONMENT........................................................................................................................7 3.1Addressofthetestlaboratory....................................................................................................................7 3.2TestFacility...................................................................................................................................................7 3.3Environmentalconditions............................................................................................................................7 3.4Summaryofmeasurementresults..............................................................................................................8 3.5Statementofthemeasurementuncertainty..............................................................................................8 3.6EquipmentsUsedduringtheTest..............................................................................................................9 4TESTCONDITIONSANDRESULTS.......................................................................................11 4.1ACPowerConductedEmission................................................................................................................11 4.2RadiatedEmission......................................................................................................................................14 4.320dBBandwidth..........................................................................................................................................20 4.4DeactivationTime.......................................................................................................................................21 4.5AntennaRequirement.........................................................................................................................…

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FCCID：2AG2K-BEL497 FCCID：2AG2K-BEL497