2A9F7-MYSTORMystor

ShenzhenEnvisionTechnologyInnovationCo.,Ltd. CoveredEquipmentCertificationAttestationLetter 04/17/2026 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2A9F7-MYSTOR ShenzhenEnvisionTechnologyInnovationCo.,Ltd.(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtisnot“covered”equipmentprohibitedfrom receivinganequipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. ShenzhenEnvisionTechnologyInnovationCo.,Ltd.(“theapplicant”)certifiesthat,asofthe dateofthefilingoftheapplication,theapplicantisnotidentifiedontheCoveredList(as aspecificallynamedentityoranyofitssubsidiariesoraffiliates)asanentityproducing “covered”equipment. ShenzhenEnvisionTechnologyInnovationCo.,Ltd. (“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtdoesnotincludecybersecurityoranti-virus softwareproducedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsand assignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886 andKDB986446D01CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:JasonTang Title:Manager CompanyName:ShenzhenEnvisionTechnologyInnovationCo.,Ltd. Date:04/17/2026

Shenzhen Envision Technology Innovation Co., Ltd. * the applicant must designate a contact located in the United States for purposes of acting as the appl icant’s agent for service of process, regardless of whether the applicant is a domestic or forei gn ent ity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 04/17/2026 TO: Feder al Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2A9F7-MYSTOR FRN of applicant: 0033105990 Per section 2.911(d)(7) of the FCC rules, [Shenzhen Envision Technology Innovation Co., Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: C ompany Name: FCC US Agent, LLC FCC Registration Number (FRN): 0033402884 Physical U.S. Company Address: 3722 Illinois Avenue, Saint Charles, IL 60174, USA Contact Person: Tim Payne Agent Email Address: [email protected] The abov e contact person accepts the obligation for service of process. The appl icant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. A pplicant Signed: Agent Signed (if different from Applicant): Signed: Printed name: Jason Tang Title: Manager Company Name: Shenzhen Envision Technology Innovation Co., Ltd. Date: 04/17/2026 S igned: Printed name: Tim Payne Title: Manager Company Name: FCC US Agent, LLC Date: 04/17/2026

DATE:04/17/2026 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointShenzhenEUTestingLaboratoryLimited (101,BuildingB1,FuqiaoFourthArea,QiaotouCommunityFuhaiSubdistrictBaoan District,Shenzhen,China)(NameofAgentcompanynameandaddress)toactasour agentinthepreparationofthisapplicationforequipmentcertification.Icertifythat submitteddocumentsproperlydescribethedeviceorsystemforwhichequipment certificationissought.Ialsocertifythateachunitmanufactured,importedormarketed,as definedintheFederalCommunicationsCommission’sregulationswillhaveaffixedtoita labelidenticaltothatsubmittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonour behalf,Iacknowledgethatallresponsibilityforcomplyingwiththetermsandconditions forcertification,stillresideswithShenzhenEnvisionTechnologyInnovationCo.,Ltd. (301,Building4,1970ScienceandTechnologyPark,MinzhiStreet,LonghuaDistrict, Shenzhen,China)(ApplicantNameandaddress) Signed: Printedname:JasonTang Title:Manager CompanyName:ShenzhenEnvisionTechnologyInnovationCo.,Ltd. Date:04/17/2026

Date04/17/2026 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 RE:LETTEROFAGENTAUTHORIZATION ToWhomItMayConcern: We,theundersigned,herebyauthorizeComplianceTesting,LLCtoactonourbehalfinallmatters relatingtoapplicationforequipmentauthorization,includingthesigningofalldocumentsrelatingto thesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothedenialof benefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21 U.S.C.853(a). Sincerely, Signed: Printedname:JasonTang Title:Manager CompanyName:ShenzhenEnvisionTechnologyInnovationCo.,Ltd. Date:04/17/2026

DATE04/17/2026 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:___2A9F7-MYSTOR______ ProductName:___Mystor___ RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommission’srules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: (Listherethedocumentsforwhichyouareseekingconfidentiality–forexample...)  Schematics Blockdiagram Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. Signed: Printedname:JasonTang Title:Manager CompanyName:ShenzhenEnvisionTechnologyInnovationCo.,Ltd. Date:04/17/2026

DATE:04/17/2026 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2A9F7-MYSTOR ProductName:Mystor RequestforShort-TermConfidentiality PursuanttoSections0.457and0.459ofthecommissionrules,andinaccordancewiththeFCCPublicnotice datedJune15,2004(DA04-1705),weherebyrequestshort-termconfidentialityforthefollowingitemspriorto marketingthedevice.: TestSetupPhotos ExternalPhotos InternalPhotos UserManual Theapplicantrequeststheexhibitsselectedaboveasshorttermconfidentialbewithheldfrompublicview foraperiodof180daysfromthedateoftheGrantofEquipmentAuthorizationandpriortomarketing.This istoavoidprematurereleaseofsensitiveinformationpriortomarketingorreleaseoftheproducttothe public. Signed: Printedname:JasonTang Title:Manager CompanyName:ShenzhenEnvisionTechnologyInnovationCo.,Ltd. Date:04/17/2026

ShenzhenEnvisionTechnologyInnovationCo.,Ltd. DeclarationonModelDifferences We, ShenzhenEnvisionTechnologyInnovationCo.,Ltd. 301,Building4,1970ScienceandTechnologyPark,MinzhiStreet,LonghuaDistrict, Shenzhen,China Declarethatthefollowingproduct(s): ProductName:Mystor ModelNo.:Mystor,Mystor-I,Mystor-II,Mystor-III,Mystor-IV,Mystor-V FCCID:2A9F7-MYSTOR Allmodelsaresamewithelectricalparametersandinternalcircuitstructure,butonlydifferin appearancecolorandmodelname.Therefore,the(Mystor)modelwillbetheprimarytest model. Themanufacturerwouldtakealltheresponsibilitiesfortheaboveproduct(s). Forandonbehalfof Shenzhen,China AuthorizedpersonLocation Name:JasonTang Position:Manager Dateofissue:2026-04-17 *IherebydeclarethatIamentitledtosignonbehalfoftheapplicantandthattheinformationsuppliediscorrectandcomplete.

LabelLocation Label Size:40*50mm ProductName:Mystor ModelNo.:Mystor Input:5VDC FCCID:2A9F7-MYSTOR

RFEXPOSUREEVALUATION FCCID:2A9F7-MYSTOR AccordingtoFCC1.1310:Thecriterialistedinthefollowingtableshallbeused toevaluatetheenvironmentimpactofhumanexposuretoradiofrequency(RF) RadiationasspecifiedinKDB447498D01: RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,using measurementsorcomputersimulation.WhenroutineSARevaluationisnot required,portabletransmitterswithoutputpowergreaterthantheapplicable lowthresholdrequireSARevaluationtoqualifyforTCBapproval. BLE: Channel (MHz) Maximum outputpower (dBm) Tuneup tolerance (dBm) MaxTune UpPower (dBm) Distance (mm) Calculation results Limit Operating Mode 2402-0.98 -0.98±1 0.0250.3113 BLE 2440-0.28-0.28±10.7250.3693 24800.370.37±11.3750.4323 2402-1.00 -1.00±1 0.0050.3103 2440-0.34-0.34±10.6650.3643 24800.320.32±11.3250.4273 TestResults:PASS.

TESTREPORT ReportNo.:8429EU122708W Applicant:ShenzhenEnvisionTechnologyInnovationCo., Ltd. Address:301, Building4, 1970Scienceand TechnologyPark, MinzhiStreet,LonghuaDistrict,Shenzhen,China ProductName:Mystor ModelNo.:Mystor(referto clause2.4) Trademark:N/A FCC ID:2A9F7-MYSTOR Test Standard(s):47 CFRPart 15.247 Test Result:Pass Dateof Receipt:Mar. 27, 2026 Test Date:Mar. 30, 2026- Apr. 08, 2026 Dateof Issue:Apr. 17, 2026 ISSUEDBY: SHENZHENEU TESTINGLABORATORYLIMITED Preparedby:Reviewedand Approvedby: LandonQiu/ EngineerSallyZhang/Manager Page2 of 70ReportNo.: 8429EU122708W TRF Version:A01 RevisionRecord ReportVersionIssuedDateDescriptionStatus V0Apr. 17, 2026OriginalValid Page3 of 70ReportNo.: 8429EU122708W TRF Version:A01 Tableof Contents 1 COVERPAGE...........................................................................................................................................................1 2 GENERALINFORMATION...............................................................................................................................5 2.1 APPLICANTINFORMATION.......................................................................................................................5 2.2 MANUFACTURERINFORMATION...............................................................................................................5 2.3 FACTORYINFORMATION..........................................................................................................................5 2.4 GENERALDESCRIPTIONOFE.U.T...........................................................................................................5 2.5 TECHNICALINFORMATIONOFE.U.T........................................................................................................6 3 TESTSUMMARY..............................................................................................................................................7 3.1 TESTSTANDARD.....................................................................................................................................7 3.2 TESTVERDICT........................................................................................................................................7 3.3 TESTLABORATORY.................................................................................................................................8 4 TESTCONFIGURATION...................................................................................................................................9 4.1 TESTENVIRONMENT...............................................................................................................................9 4.2 TESTEQUIPMENT...................................................................................................................................9 4.3 DESCRIPTIONOFSUPPORTUNIT...........................................................................................................11 4.4 TESTMODE..........................................................................................................................................11 4.5 DESCRIPTIONOFCALCULATION............................................................................................................11 4.5.1FieldStrengthCalculation.....................................................................................................11 4.5.2DisturbanceCalculation........................................................................................................11 4.6 MEASUREMENTUNCERTAINTY..............................................................................................................12 4.7 DEVIATIONFROMSTANDARDS...............................................................................................................12 4.8 ABNORMALITIESFROMSTANDARDCONDITION......................................................................................12 5 EVALUATIONRESULTS(EVALUATION)......................................................................................................13 5.1 ANTENNAREQUIREMENT.......................................................................................................................13 5.1.1Test Specification..................................................................................................................13 5.1.2Test Data ...............................................................................................................................13 6 RADIOSPECTRUMMATTERTESTRESULTS(RF) ....................................................................................14 6.1 CONDUCTEDEMISSIONATACPOWERLINE...........................................................................................14 6.1.1Test Specification..................................................................................................................14 6.1.2E.U.T.Operation....................................................................................................................14 6.1.3Test SetupDiagram...............................................................................................................14 6.1.4Test Data ...............................................................................................................................14 6.2 6DB BANDWIDTH..................................................................................................................................17 6.2.1Test Specification..................................................................................................................17 6.2.2E.U.T.Operation....................................................................................................................17 6.2.3Test SetupDiagram...............................................................................................................18 6.2.4Test Data ...........................................................................................................…

Text truncated - open the document above for the full version.

DongGuanSYLTechnologyCO.,LTD AntennaSpecification Manufacture ： SYL ProductName：HYKJ-001-BT黑翼杯Antenna AntennaType：CeramicAntenna TestDate ： 2026/3/13 Testedby： ChengMingWei CheckedBy: DuLin ApprovedBy: QianCongGen Dong GuanSYL Techno logyCO. ,LTD 1.GeneralDescription Manuf acturer： Address ： Prod uctName： Prod uctmodel： Ant en na Type ： Test Freq uency： Ant en na Gain： VSWR： Im ped ance： Polarization ： DongGua nSYLTechn ology CO.,LTD R oom 203,DongHui Industrial Park,No.198DaTangRoa d, DongGuan, Guan gDong,China HYKJ-001-BT 黑翼杯 Antenna HYKJ-001-BT 黑翼杯 CeramicA ntenna 2400-2500MHz 1.6dBi ＜2 50Ω L inear DongGuanSYLTechnologyCO.,LTD 2.Antennasize: DongGuanSYLTechnologyCO.,LTD 3.GainandEfficiency 3DEfficiencyTable 3DEfficiencyvs.Frequency DongGuanSYLTechnologyCO.,LTD 4.ReturnLoss DongGuanSYLTechnologyCO.,LTD 5.XY-Plane 6.XZ-Plane 7.YZ-Plane DongGuanSYLTechnologyCO.,LTD 8.3DRadiationPatternDiagram DongGuanSYLTechnologyCO.,LTD 10.TestSetupPhoto