2BVRIMAESTRORemote Control for Laser Level

RemoteControlforLaserLevel OPERATINGINSTRUCTIONS InitialPairingwiththeRemoteControl Whenusingyourremotecontrolforthefirsttime,aone-timepairing processisneeded: 1.TurnyourMaestrolaserlevelon. 2.Within3seconds,presstheV2buttononyourremotecontrol. 3.AsuccessfulpairingisindicatedbyabeeponyourMaestrolevel. OPERATINGINSTRUCTIONS Selectthedesiredlineconfigurationbypressingtherespective buttonsonthekeypad: a.Horizontallinebuttonoperatesinthefollowingcycle: TopHorizontalactive(default)→Nolines→Bottom horizontal. b.VerticallinesbuttonsoperatesasON\OFFbuttonsforV1andV2. C.ShortpressonECO/button(2.d)toactivateECOmode&Flashmode FederalCommunicationsCommission(FCC)Statement. Thisdevicecomplieswithpart15oftheFCCRules.Operationissubjecttothefollowingtwo conditions: (1)Thisdevicemaynotcauseharmfulinterference,and (2)thisdevicemustacceptanyinterferencereceived,includinginterferencethatmaycause undesiredoperation. Note:ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigital device,pursuanttopart15oftheFCCRules.TheselimitsaredesignedtoprovideReasonable protectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgenerates, usesandcanradiateradiofrequencyenergyand,ifnotinstalledandusedinaccordancewiththe instructions,maycauseharmfulinterferencetoradiocommunications.However,thereisno guaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoes causeharmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturning theequipmentoffandon,theuserisencouragedtotrytocorrecttheinterferencebyoneor moreofthefollowingmeasures: •Reorientorrelocatethereceivingantenna. •Increasetheseparationbetweentheequipmentandreceiver. •Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiveris connected. •Consultthedealeroranexperiencedradio/TVtechnicianforhelp. Warning:Changesormodificationsnotexpresslyapprovedbythepartyresponsiblefor compliancecouldvoidtheuser'sauthoritytooperatetheequipment. Note:ThemanufacturerisnotresponsibleforanyradioorTVinterferencecausedby unauthorizedmodificationstothisequipment.Suchmodificationscouldvoidtheuser’sauthority tooperatetheequipment. RFexposurestatement: ThisdevicecomplieswithFCCRFradiationexposurelimitssetforthforanuncontrolled environment.Thedeviceisinstalledandoperatedwithoutrestriction.

TCBCALLpágina3 FileFCCID2BVRIMAESTRO PleaseuploadanexhibitthatexplainshowdoestheTCBverifythenewagentinformation: 1-IstheaddressoftheagentavalidphysicalUSmailingaddress(notaUSpostofficebox,notavirtualmailbox,notP.O.Boxes,notavacantlot,nota publicbuilding,etc.) ○Wehavecheckediftheaddressexistsinarealandpotentialbuilding(Googlemaps)+officialUSregister,afterthisverificationandtheevidenceas below: notaUSpostofficebox notapublicbuilding(note) FRN Googlemap Web notavirtualmailbox notP.O.Boxes notavacantlot TCBCALLpágina3 TCBCALLpágina3 TCBCALLpágina3 TCBCALLpágina3 ►CONCLUSIONbyTCB:TheASOPdefinedandprovidedbygranteeisVALIDandconfirmed.Thereforetheexhibit"美代信"includedinthefileisok. 2-IstheagentphysicallylocatedatthatvalidUSaddresssuchthattheagentcanbelegallyservedatthataddress? Yes,checkabove3-Hasthelistedagentclearlyagreedinwritingtoserveastheagentforthegranteeatthataddress? 3-Hasthelistedagentclearlyagreedinwritingtoserveastheagentforthegranteeatthataddress? TCBCALLpágina3 Yes,itisincludedintheexhibit"美代信G".

KAPROTOOLSLIMITED * theapplicantmustdesignateacontactlocatedintheUnitedStatesforpurposesofactingasthe applicant’sagentforserviceofprocess,regardlessofwhethertheapplicantisadomesticorforeign entity.AnapplicantlocatedintheUnitedStatesmaydesignateitselfastheagentforserviceofprocess. U.S.AgentDesignationforServiceofProcess- CertificationAttestationLetter 5/21/2026 TO:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 ATTN.:ReviewingEngineer FCCID:2BVRIMAESTRO FRNofapplicant:0038325742 Persection2.911(d)(7)oftheFCCrules,KAPROTOOLSLIMITED(“theapplicant”)certifies thattheequipmentforwhichauthorizationissoughtisdesignatedtothefollowingU.S.agent* forserviceofprocess: CompanyName:KaproToolsInc. FCCRegistrationNumber(FRN):0038446217 PhysicalU.S.CompanyAddress:251EnterpriseDrLakeMillsWisconsin,USA ContactPerson:StacyKing ContactPhone:+1920-297-4697 AgentEmailAddress:[email protected] Theabovecontactpersonacceptstheobligationforserviceofprocess. Theapplicantacceptstomaintainanagentfornolessthanoneyearafterthegranteehas terminatedallmarketingandimportationortheconclusionofanyCommission-related proceedinginvolvingtheequipment. ApplicantSigned: Signed: Printedname:LenneyWang Title:R&DBusinessManager CompanyName: KAPROTOOLSLIMITED Date:5/21/2026 AgentSigned(ifdifferentfromApplicant): Signed: Printedname: StacyKing Title:BusinessManager CompanyName:KaproToolsInc. Date:5/21/2026

AttestationStatement. OldCode:C526609124NewCode:00015544Ed.3 Changereason:FRNisaddedtotheApplicantinformationsection. 1/1 TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 TheCommissionadoptedrulesthatprohibitequipmentauthorizationfor“covered” telecommunicationsequipmentandvideosurveillanceequipmentproducedbyentitiesidentified ontheCommission’sCoveredList 1 ,whichisperiodicallyupdated.SeetheCoveredListformore details.ThisAttestationStatementistoconfirmthatwefollowtheSection2.911(d)(5)(i)-(ii) Applicant Companyname:KAPROTOOLSLIMITED Granteecode:2BVRI FCCID:2BVRIMAESTRO FRN:0038325742 ContactName:LenneyWang Address:NO.35SHANLONGHEROAD,CHINA(SHANDONG)PILOTFREETRADEZONE QINGDAOAREA,QINGDAO,SHANDONG,P.R.CHINA TelephoneNo:+8653286106865 FaxNo:+8653286106865 Email:[email protected] i.[KAPROTOOLSLIMITED](“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtisnot“covered”equipmentprohibitedfrom receivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules.Theapplicantmustsignthiscertification. ii.[KAPROTOOLSLIMITED](“theapplicant”)certifiesthat,asofthedateof thefilingoftheapplication,theapplicant[isnot](asaspecificallynamed entityoranyofitssubsidiariesoraffiliates)identifiedontheCoveredListas anentityproducing“covered”equipment.Theapplicantmustsignthis certification. [KAPROTOOLSLIMITED](“theapplicant”)certifiesthat,asofthedateofthefiling ofthe application,theapplicant[isnot]identifiedontheCoveredList asanentityproducing“covered” equipment. Date:5/12/2026 Applicant’sName:LenneyWang Title:R&DManager Signature 1 TheCommission’sCoveredListispublishedbythePublicSafetyandHomelandSecurityBureauandpostedonthe Commission’swebsite.ThisCoveredList,whichisperiodicallyupdated,identifiesparticularequipment,producedby particularentities,thatconstitutes“covered”equipment.https://www.fcc.gov/supplychain/coveredlist

KAPROTOOLSLIMITED Code00018768Ed.1 Item1.Thedeviceisabletoinstallsoftware/programinstallation? ☐ Yes,gotoItem2. ☒ No.Inthiscase,therestoftheitemsdonotapply.Thedevicecannotsupport installationofKasperskycybersecurityoranti-virussoftware. DeviceRemoteControlforLaserLevel CompanynameKAPROTOOLSLIMITED Granteecode2BVRI FCCID2BVRIMAESTRO FRN0038325742 ContactnameLenneyWang AddressNO.35SHANLONGHEROAD,CHINA (SHANDONG)PILOTFREETRADEZONE QINGDAOAREA,QINGDAO,SHANDONG, P.R.CHINA Telephonenumber+8653286106865 [email protected] Chipset/moduleinformationCMT2119A OperatingSystem(ifapplicable)Notapplicable StorageCapacity(harddriveor otherpermanentmemorystorage, ifapplicable) Notapplicable 2 Item2.TechnicalRequirementsforKasperskyCybersecuritySoftware: #GeneralRequirements(ForallDevices)Yes/Noor N/A Comments 1Internetconnectionforactivationandupdates(Forall OperatingSystems) N/A #GeneralRequirements(ForWindowsDevices)Yes/Noor N/A Comments 1Storage:1500MBfreespaceontheharddriveN/A 2OperatingSystem: MicrosoftWindows8,8.1,10&11Home/Pro/ EnterpriseMicrosoft Windows7Starter/HomeBasic&Premium/ Professional/UltimateSP1orhigher N/A 3Processor:1GHzorhigher(x86orx64)N/A 4Memory(RAM)1GB(32-bit)or2GB(64-bit)N/A 5ScreenResolution:Minimumresolutionof1024x768N/A #GeneralRequirements(FormacOSdevices)Yes/Noor N/A Comments 1OperatingSystemmacOS®13–14N/A 2Memory(RAM)4GBN/A 3Storage:3455MBfreespaceontheharddriveN/A #GeneralRequirements(ForAndroidDevices)Yes/Noor N/A Comments 1Storage:150MBfreespaceN/A 2OperatingSystem:Android™10–14N/A 3ScreenResolution:Minimumresolutionof320x480N/A 3 #GeneralRequirements(foriOSdevices)Yes/Noor N/A Comments 1Storage:150MBfreespaceN/A 2OperatingSystem:iOS®17N/A #GeneralRequirements(ForLinuxsystem)Yes/Noor N/A Comments 1Harddrive:1GBoffreespaceN/A 2CPU:IntelPentium1GHzorhigherN/A 3RAM:1GBN/A 4Minimumsoftwarerequirements: AlmaLinuxOS8orlater; AlterOS7.5orlater; AstraLinuxCommonEdition2.12orlater; CentOS6.7orlater; DebianGNU/Linux10.0orlater; EulerOS2.0orlater; OracleLinux7.3orlater; RedHatEnterpriseLinux6.7orlater; RockyLinux8.5orlater; SUSELinuxEnterpriseServer12.5orlater; Ubuntu12.04orlater; UncomOSHome/Business/Education/Enterprise 2.2orlater; ALTLinuxWorkstaton/WorkstationK/Server/ Education8orlater; ROSALinuxWorkstation/Server12orlater; REDOS7.3andlater; N/A 4 Afterreviewedthetechnicalrequirements,isthedevicecapableofsupportingthe installationofKasperskysoftware? ☐ Yes,gotoItem3. ☒ No.Inthiscase,therestoftheitemsdonotapply.Thedevicecannotsupport installationofKasperskysoftware Item3.ConnectivityCapabilities: #PhysicalInterfacePurposeJustification 1 1 #WirelessInterfacePurposeJustification 1 1 Afterthereviewofthisitems,thedevice: ☒Cannotsupportinstallationofanycybersecurityoranti-virussoftwareonthecovered list. ☐Potentiallycanoperatewithanycybersecurityoranti-virussoftwareonthecoveredlist –additionalthird-partyproofisprovidedtodemonstratecompliancewithrequirementsas of2.911(d)5(i),(ii)–“ProofofCompliancewithCoveredListSoftwareRequirements”ofthis documentapplies Signature:Name: Lenney Wang Date: 5/30/2026 1 Thejustificationfieldisusedtojustifywhythesoftwarecannotbereceivedthroughthatinterface.Checktheannexformore indications.

KAPROTOOLSLIMITED NO.35SHANLONGHEROAD,CHINA(SHANDONG)PILOTFREETRADEZONE QINGDAOAREA,QINGDAO,SHANDONG,P.R.CHINA Tel:+8653286106865Fax:+8653286106865 SeriesModelsDescription FCC ID: 2BVRIMAESTRO Date: May 21, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Model: MAESTRO-4D, MAESTRO-3D To whom it may concern: We KAPRO TOOLS LIMITED hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e.,circuit design,PCB Layout,RF module/circuit,antenna type(s) and antenna location, components on PCB,etc.),same mechanical structure and design (including product enclosure, materials, etc.), All models are the same circuit and RF module, except for the appearance color and customer number are different. Thanks Sincerely, Lenney Wang /R&D Manager

C5266091_X10_Ed.2 1/1 KAPROTOOLSLIMITED OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 Date:5/12/2026 Subject:RequestforConfidentiality FCCID:2BVRIMAESTRO ToWhomItMayConcern, PursuanttotheprovisionsofSections0.457and0.459ofCommission'srules (47CFR0.457,0.459),wearerequestingtheCommissiontowithholdthefollowing attachment(s)asconfidentialdocumentfrompublicdisclosure. ExhibitsLong-Term Confidentiality Short-Term Confidentiality NOTE2 IDLabel/LocationNoNo AttestationStatementNoNo ExternalPhotosNo ☐ BlockDiagram ☒☐ Schematics ☒☐ TestReportNoNo TestSetupPhotosNo ☐ User’sManual ☐ NOTE 1 ☐ InternalPhotos ☐ NOTE 1 ☐ PartsList/TuneUp ☐☐ RFExposureInfoNoNo OperationalDescription ☒☐ CoverLetter(s)NoNo SDRSoftware/SecurityInfo ☐ No NOTE1:Long-TermConfidentialitymaybepermittedunderspecialconditions(SeeII.LONG-TERMCONFIDENTIALITY,Section3of KDB726920,uselastinforce) NOTE2:Short-TermConfidentialitycanberequestedforamaximumof180daysfromthedateofthegrant. Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionare consideredasproprietaryinformationinoperationoftheequipment.Thepublic disclosureofabovedocumentsmightbeharmfultoourcompanyandwouldgive competitoranunfairadvantageinthemarket. Incaseofshort-termConfidentiality,theapplicantrequeststheexhibitsselected abovearewithheldfrompublicviewforaperiodof______daysfromthedateofthe GrantofEquipmentAuthorizationandpriortomarketing. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondentduringcertificationreviewprocesscannotbegrantedasconfidential documentsandthoseinformationwillbeavailableforpublicreviewoncethegrantof equipmentauthorizationisissued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name:LenneyWang Title:R&DManager

C5266091_X8_Ed.1 1/1 LetterofAuthorization KAPROTOOLSLIMITED Company:KAPROTOOLSLIMITED Address:NO.35SHANLONGHEROAD,CHINA(SHANDONG)PILOT FREETRADEZONEQINGDAOAREA,QINGDAO,SHANDONG, P.R.CHINA ProductName:RemoteControlforLaserLevel ModelNumber:MAESTRO-4D,MAESTRO-3D FCCIdentifier:2BVRIMAESTRO WeauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdelCarme,s/n, 08193Bellaterra,Spain,toactonourbehalfonallmattersconcerningthe abovenamedequipment. AnyindividualwithinLGAITechnologicalCenterS.A.isauthorizedtoactonour behalfandtakeactionontheapplication. WedeclarethatauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdel Carme,s/n,08193Bellaterra,Spain,isallowedtoforwardallinformation relatedtotheapprovalprojecttotheFederalCommunicationCommissionand todiscussanyissuesconcerningtheapprovalapplication.Anyandallacts carriedoutbyLGAITechnologicalCenterS.A.onourbehalfshallhavethe sameeffectasactsofourown. Name:LenneyWangDate:5/30/2026 Title:R&DManager Signatureofapplicant:

FCCID:2BVRIMAESTROPage1of3ReportNo.:CTL2512081021-WF ExternalPhotosofEUT FCCID:2BVRIMAESTROPage2of3ReportNo.:CTL2512081021-WF FCCID:2BVRIMAESTROPage3of3ReportNo.:CTL2512081021-WF

FCCID:2BVRIMAESTROPage1of1ReportNo.:CTL2512081021-WF FCCIDLabelInformation Labellocation: FCC ID: 2BVRIMAESTRO Modle: MAESTRO-4D

FCCID:2BMEN-LF-YJ001Page 1 of 3 ReportNo.:CTL2504118151-WF InternalPhotosofEUT FCCID:2BMEN-LF-YJ001Page 2 of 3 ReportNo.:CTL2504118151-WF FCCID:2BMEN-LF-YJ001Page 3 of 3 ReportNo.:CTL2504118151-WF Antenna

ShenzhenCTLTestingTechnologyCo.,Ltd. Tel:+86-755-89486194E-Mail:[email protected] RFExposureevaluation ReportReferenceNo.....................:CTL2512081021-WFH Compiledby: (printedname+signature) GaryGao Reviewedby: (printedname+signature) HappyGuo Approvedby: (printedname+signature) IvanXie ProductName.................................: RemoteControlforLaserLevel Model/Typereference .................... : MAESTRO-4D ListModel(s) .................................... : MAESTRO-3D TradeMark ....................................... : N/A FCCID...............................................: 2BVRIMAESTRO Applicant’sname...........................: KAPROTOOLSLIMITED Addressofapplicant ..................... : NO.35SHANLONGHEROAD,CHINA(SHANDONG)PILOT FREETRADEZONEQINGDAOAREA,QINGDAO, SHANDONG,P.R.CHINA Testspecification ........................... : Standard............................................: 47CFR§1.1310 47CFR§2.1093 KDB447498D01GeneralRFExposureGuidancev06 TRFOriginator .................................. : ShenzhenCTLTestingTechnologyCo.,Ltd. MasterTRF.......................................:Dated2017-01 Dateofreceiptoftestitem..........: February2,2026 DateofTest .................................... : February2,2026-April21,2026 DateofIssue....................................: April22,2026 Result................................................: Pass ShenzhenCTLTestingTechnologyCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenCTLTestingTechnologyCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenCTLTestingTechnologyCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. V1.0Page2of11ReportNo.:CTL2512081021-WFH TESTREPORT TestReportNo.:CTL2512081021-WFH April22,2026 Dateofissue ProductName: RemoteControlforLaserLevel SampleNo:CTL251208102001,CTL251208102003 Model/Type: MAESTRO-4D ListedModels : MAESTRO-3D Applicant: KAPROTOOLSLIMITED Address : NO.35SHANLONGHEROAD,CHINA(SHANDONG) PILOTFREETRADEZONEQINGDAOAREA, QINGDAO,SHANDONG,P.R.CHINA Manufacturer: KAPROTOOLSLIMITED Address : NO.35SHANLONGHEROAD,CHINA(SHANDONG) PILOTFREETRADEZONEQINGDAOAREA, QINGDAO,SHANDONG,P.R.CHINA Thetestresultspresentedinthisreportrelateonlytotheobjecttested. Thisreportshallnotbereproduced,exceptinfull,withoutthewrittenapprovaloftheissuingtesting laboratory. Thedevice(ProductName:RemoteControlforLaserLevel)ModelsName:MAESTRO-4D,MAESTRO-3D havesameelectrical,PCBandBOM,onlythecolourandmodel ’ snamesaredifferentformarketing requirements. V1.0Page3of11ReportNo.:CTL2512081021-WFH **ModifiedHistory** RevisionDescriptionIssuedDataReportNo.Remark Version1.0InitialTestReportReleaseApril22,2026CTL2512081021-WFHTracyQi V1.0Page4of11ReportNo.:CTL2512081021-WFH Contents 1GENERALINFORMATION..................................................................................................................................................5 1.1ENVIRONMENTALCONDITIONS................................................................................................................................................5 1.2PRODUCTDESCRIPTION.........................................................................................................................................................5 1.3TESTFACILITY......................................................................................................................................................................6 1.4STATEMENTOFTHEMEASUREMENTUNCERTAINTY......................................................................................................................6 2METHODOFMEASUREMENT...........................................................................................................................................8 2.1APPLICABLESTANDARD..........................................................................................................................................................8 2.2EVALUATIONMETHODANDLIMIT...........................................................................................................................................8 3CONDUCTEDPOWERRESULTS.........................................................................................................................................9 4MANUFACTURINGTOLERANCE......................................................................................................................................10 5EVALUATIONRESULTS.....................................................................................................................................................11 5.1STANDALONEEVALUATION....................................................................................................................................................11 6CONCLUSION..................................................................................................................................................................11 V1.0Page5of11ReportNo.:CTL2512081021-WFH 1GENERALINFORMATION 1.1Environmentalconditions Duringthemeasurementtheenvironmentalconditionswerewithinthelistedranges: NormalTemperature:18°C-28°C RelativeHumidity:30%-60% AirPressure:965Pa-1030Pa 1.2ProductDescription ProductName:RemoteControlforLaserLevel Model/Typereference:MAESTRO-4D EUTRatedVoltage:DC12Vforbattery TestVoltage: DC12Vforbattery Wirelesstechnology Operatingfrequency: 433.92MHz Modulationtype:ASK Antennatype:PCBOn-boardAntenna AntennaGain:1.5dBiprovidedbyApplicantManufacturer Note1:Formoredetails,refertotheuser’smanualoftheEUT. Note2:Antennagainandcablelossprovidedbytheapplicant. Note3:ThemodelMAESTRO-4Disselectedasrepresentativemodelforfulltests V1.0Page6of11ReportNo.:CTL2512081021-WFH 1.3TestFacility 1.3.1Testlaboratory CompanyName:ShenzhenCTLTestingTechnologyCo.,Ltd. Address1:ZoneA.1/F..Warehouse2.BaishaTechnologyPark,No.3011,ShahexiRoad, NanshanDistrict…

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ShenzhenCTLTestingTechnologyCo.,Ltd. Tel:+86-755-89486194E-mail:[email protected] TESTREPORT 47CFRFCCPart15SubpartC15.231 ReportReferenceNo. .................... :CTL2512081021-WF Compiledby: (printedname+signature) GaryGao Reviewedby: (printedname+signature) HappyGuo Approvedby: (printedname+signature) IvanXie ProductName.................................: RemoteControlforLaserLevel Model/Typereference .................... : MAESTRO-4D ListModel(s)....................................: MAESTRO-3D TradeMark.......................................: N/A FCCID...............................................: 2BVRIMAESTRO Applicant’sname ........................... : KAPROTOOLSLIMITED Addressofapplicant.....................: NO.35SHANLONGHEROAD,CHINA(SHANDONG)PILOT FREETRADEZONEQINGDAOAREA,QINGDAO, SHANDONG,P.R.CHINA Testspecification...........................: Standard ............................................ : 47CFRFCCPart15SubpartC15.231 TRFOriginator..................................: ShenzhenCTLTestingTechnologyCo.,Ltd. MasterTRF ....................................... :Dated2011-01 Dateofreceiptoftestitem .......... : February2,2026 DateofTestDate............................: February2,2026-April21,2026 DateofIssue .................................... : April22,2026 Result................................................: Pass ShenzhenCTLTestingTechnologyCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenCTLTestingTechnologyCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenCTLTestingTechnologyCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. V1.0Page2of28ReportNo.:CTL2512081021-WF TESTREPORT TestReportNo.: CTL2512081021-WF April22,2026 Dateofissue EquipmentunderTest: RemoteControlforLaserLevel SampleNo. :CTL251208102001,CTL251208102003 Model/Type: MAESTRO-4D ListedModels: MAESTRO-3D Applicant: KAPROTOOLSLIMITED Address : NO.35SHANLONGHEROAD,CHINA(SHANDONG) PILOTFREETRADEZONEQINGDAOAREA,QINGDAO, SHANDONG,P.R.CHINA Manufacturer: KAPROTOOLSLIMITED Address : NO.35SHANLONGHEROAD,CHINA(SHANDONG) PILOTFREETRADEZONEQINGDAOAREA,QINGDAO, SHANDONG,P.R.CHINA TestresultPass* *Intheconfigurationtested,theEUTcompliedwiththestandardsspecifiedpage5. Thetestresultspresentedinthisreportrelateonlytotheobjecttested. Thisreportshallnotbereproduced,exceptinfull,withoutthewrittenapprovaloftheissuingtesting laboratory. Thedevice(ProductName:RemoteControlforLaserLevel)ModelsName:MAESTRO-4D,MAESTRO-3D havesameelectrical,PCBandBOM,onlythecolourandmodel ’ snamesaredifferentformarketing requirements. V1.0Page3of28ReportNo.:CTL2512081021-WF **ModifiedHistory** VersionDescriptionIssuedDataReportNo.Remark Version1.0InitialTestReportReleaseApril22,2026CTL2512081021-WFTracyQi V1.0Page4of28ReportNo.:CTL2512081021-WF TableofContentsPage 1.SUMMARY.......................................................................................................................................................................5 1.1.TESTSTANDARDS.................................................................................................................................................................5 1.2.TESTDESCRIPTION...............................................................................................................................................................5 1.3.TESTFACILITY.....................................................................................................................................................................6 1.4.STATEMENTOFTHEMEASUREMENTUNCERTAINTY.....................................................................................................................6 2.GENERALINFORMATION.................................................................................................................................................8 2.1.ENVIRONMENTALCONDITIONS...............................................................................................................................................8 2.2.GENERALDESCRIPTIONOFEUT.............................................................................................................................................8 2.3.DESCRIPTIONOFTESTMODESANDTESTFREQUENCY................................................................................................................8 2.4.EQUIPMENTSUSEDDURINGTHETEST.....................................................................................................................................8 2.5.RELATEDSUBMITTAL(S)/GRANT(S)......................................................................................................................................9 2.6.MODIFICATIONS..................................................................................................................................................................9 3.TESTCONDITIONSANDRESULTS...................................................................................................................................10 3.1.RADIATEDEMISSION..........................................................................................................................................................10 3.2.20DBBANDWIDTH............................................................................................................................................................17 3.3.DWELLTIME.....................................................................................................................................................................19 3.4.ANTENNAREQUIREMENT....................................................................................................................................................20 4.TESTSETUPPHOTOSOFTHEEUT.......................................................................................................…

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Shenzhen Huafangyuan Electronics Co., Ltd. No. 2, Fukang Road, Building 36, Fumin Industrial Zone, Pinghu Town, Shenzhen China Antenna Technical Specification Term Model Number528-4KEY-433.92MHz Resonant Frequency433.92MHz±0.1MHz Impedance50Ω±5% Antenna TypePCB On-board Antenna PCB SubstrateFR-4(ε=4.4,tanδ≤0.02） TopologyPi (π) LC Matching Network Peak Gain1.5dBi Operating Bandwidth(VSWR≤2.0)：≥20MHz（423.9~443.9MHz)

FCCID:2BVRIMAESTROPage1of2ReportNo.:CTL2512081021-WF TestSetupPhotosoftheEUT FCCID:2BVRIMAESTROPage2of2ReportNo.:CTL2512081021-WF