2BRB7-RF-17KEYRF Remote control

TCBCALLpágina1 FileFCCID:2BRB7-RF-17KEY PleaseuploadanexhibitthatexplainshowdoestheTCBverifythenewagentinformation: 1-IstheaddressoftheagentavalidphysicalUSmailingaddress(notaUSpostofficebox,notavirtualmailbox,notP.O.Boxes,notavacantlot,notapublicbuilding, etc.) ○Wehavecheckediftheaddressexistsinarealandpotentialbuilding(Googlemaps)+officialUSregister,afterthisverificationandtheevidencebelowwecan guaranteethefollowing: notaUSpostofficebox notavirtualmailbox notP.O.Boxes notavacantlot notapublicbuilding(note) ►WecheckedtheFCCFRNSearchbasedontheinformationprovidedbythegrantee. Ontheofficialregisterfrom:https://apps.dos.ny.gov/publicInquiry/EntityDisplay Google: TCBCALLpágina2 StateofNewYorkdepartmentofState: TCBCALLpágina3 TCBCALLpágina4 ►CONCLUSIONbyTCB:TheASOPdefinedandprovidedbygranteeisVALIDandconfirmed.Thereforetheexhibit"C5266091_X23_Ed1_US_Agent_Letter" includedinthefileisok. 2-IstheagentphysicallylocatedatthatvalidUSaddresssuchthattheagentcanbelegallyservedatthataddress? Yes,checkabove 3-Hasthelistedagentclearlyagreedinwritingtoserveastheagentforthegranteeatthataddress? Yes,itisincludedintheexhibit"C5266091_X23_Ed1_US_Agent_Letter" TCBCALLpágina5

Shenzhen zhengxin Optoelectronics Technology Co., Ltd Code 00018768 Ed. 1 Device RF Remote control Company name Shenzhen zhengxin Optoelectronics Technology Co., Ltd Grantee code 2BRB7 FCC ID 2BRB7-RF-17KEY FRN 0037332293 Contact name ZHONG CHUN XIONG Address 7/F, Building A9, Xinghuaxiong Science Park, Baihua Community, Guangming District, Shenzhen, China Telephone number 13808806249 E-mail [email protected] Chipset/module information W153+crystal oscillator: 13.56MHz Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (P846 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A 3 # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A # General Requirements (For Linux system) Yes / No or N/A Comments 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher N/A 3 RAM: 1 GB N/A 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; N/A 4 SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software Item 3. Connectivity Capabilities: # Physical Interface Purpose Justification 1 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third-party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications. 5 Signature: Name: Ni Wu Date: 2026.05.19

Page 1 of 27 FCC ID: 2BRB7-RF-17KEY External Photos Model: RF-17KEY-8439 Page 2 of 27 Page 3 of 27 Page 4 of 27 Model: RF-17KEY-8439-1 Page 5 of 27 Page 6 of 27 Page 7 of 27 Model: RF-21KEY-8439 Page 8 of 27 Page 9 of 27 Page 10 of 27 Model: RF-15KEY-8439 Page 11 of 27 Page 12 of 27 Page 13 of 27 Model: RF-19KEY-8439 Page 14 of 27 Page 15 of 27 Page 16 of 27 Model: RF-18KEY-8439 Page 17 of 27 Page 18 of 27 Page 19 of 27 Model: RF-20KEY-8439 Page 20 of 27 Page 21 of 27 Page 22 of 27 Model: RF-13KEY-8439 Page 23 of 27 Page 24 of 27 Page 25 of 27 Model: RF-18KEY-8439-1 Page 26 of 27 Page 27 of 27

Label, Label location Model Label location Label RF-17KEY-8439 Label size:60mm*32mm RF-17KEY-8439-1 Label size:60mm*32mm RF-21KEY-8439 Label size:60mm*32mm RF-15KEY-8439 Label size:60mm*32mm RF-19KEY-8439 Label size:60mm*32mm Label location Label location Label location Label location Label location RF-18KEY-8439 Label size:60mm*32mm RF-20KEY-8439 Label size:60mm*32mm RF-13KEY-8439 Label size:60mm*32mm RF-18KEY-8439-1 Label size:60mm*32mm Label location Label location Label location Label location

Page 1 of 18 FCC ID: 2BRB7-RF-17KEY Internal Photos Model: RF-17KEY-8439 Page 2 of 18 Antenna Page 3 of 18 Model: RF-17KEY-8439-1 Page 4 of 18 Antenna Page 5 of 18 Model: RF-21KEY-8439 Page 6 of 18 Antenna Page 7 of 18 Model: RF-15KEY-8439 Page 8 of 18 Antenna Page 9 of 18 Model: RF-19KEY-8439 Page 10 of 18 Antenna Page 11 of 18 Model: RF-18KEY-8439 Page 12 of 18 Antenna Page 13 of 18 Model: RF-20KEY-8439 Page 14 of 18 Antenna Page 15 of 18 Model: RF-13KEY-8439 Page 16 of 18 Antenna Page 17 of 18 Model: RF-18KEY-8439-1 Page 18 of 18 Antenna

FCC ID: 2BRB7-RF-17KEY FCC RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Routine SAR evaluation refers to that specifically required by §2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to quality for TCB approval. One antenna is available for the EUT. The minimum separation distance is 5mm. ElRP= Field strength+20log(dmeas)-104.7 ElRP is the equivalent isotropically radiated power, in dBm Field strength is the field strength of the emission at the measurement distance, in dBuV/m dmeas is the measurement distance, in m FCC Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06, no stand-alone required for PCB antenna, and no simultaneous SAR measurement is required. Frequency (MHz) Field strength (dBuV/m) EIRP (dBm) Max Power (mW) Min. Distance (mm) Calc. thresholds limit 433.92 69.96 -25.20 0.003804 5.00 0.000501 3.0

ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26042077DE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of22 TESTREPORT Applicant:ShenzhenzhengxinOptoelectronicsTechnologyCo.,Ltd Address: 7/F,BuildingA9,XinghuaxiongSciencePark,BaihuaCommunity, GuangmingDistrict,Shenzhen,China Manufacturer:ShenzhenzhengxinOptoelectronicsTechnologyCo.,Ltd Address: 7/F,BuildingA9,XinghuaxiongSciencePark,BaihuaCommunity, GuangmingDistrict,Shenzhen,China ProductName:RFRemotecontrol ModelNumber: RF-17KEY-8439,RF-17KEY-8439-1,RF-21KEY-8439, RF-15KEY-8439,RF-19KEY-8439,RF-18KEY-8439, RF-20KEY-8439,RF-13KEY-8439,RF-18KEY-8439-1 Trademark:N/A FCCID:2BRB7-RF-17KEY TestDate:Apr18,2026-May19,2026 DateofReport:May28,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyBKC,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.231 C63.10-2020+Cor1-2023 Preparedby(TestEngineer): CareyZheng Reviewer(Supervisor): CaseyWang Approved(Manager): LeviXiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC26042077DE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of22 TABLEOFCONTENT 1.GeneralInformation......................................................................................4 1.1.DescriptionofDevice(EUT).......................................................................................................................4 1.2.ChannelList..................................................................................................................................................4 1.3.Summaryoftestresult................................................................................................................................4 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................4 1.5.Testmode......................................................................................................................................................5 1.6.BlockDiagram...............................................................................................................................................5 1.7.TestConditions.............................................................................................................................................5 1.8.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................5 1.9.TestFacility....................................................................................................................................................6 1.10.TestEquipment...........................................................................................................................................6 2.Conductedemissionatthemainsterminalstest......................................8 2.1.Limit................................................................................................................................................................8 2.2.TestSetup......................................................................................................................................................8 2.3.TestProcedure..............................................................................................................................................8 2.4.TestResult.....................................................................................................................................................8 3.RadiatedSpuriousEmissions.....................................................................9 3.1.Limit................................................................................................................................................................9 3.2.TestSetup....................................................................................................................................................10 3.3.TestProcedure............................................................................................................................................12 3.4.TestResult...................................................................................................................................................13 4.BandwidthTest............................................................................................16 4.1.Limit..............................................................................................................................................................16 4.2.TestSetup....................................................................................................................................................16 4.3.TestProcedure............................................................................................................................................16 4.4.TestResult...................................................................................................................................................16 5.CalculationofAverageFactor...................................................................18 5.1.Calculation...................................................................................................................................................18 6.Dwelltime.....................................................................................................20 6.1.ApplicableStandard...................................................................................................................................20 6.2.TestSetup....................................................................................................................................................20 6.3.TestProcedure.......................................................................................................................…

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Antenna specification Manufacturer: Guizhou Fenuo Electronic Technology Co., Ltd. Address: B u i l d i n g 4 , H o m e E n t r e p r e n e u r s h i p P a r k , E c o n o m i c D e v e l o p m e n t Z o n e , D u n z h a i T o w n , J i n p i n g C o u n t y , Q i a n d o n g n a n M i a o a n d D o n g A u t o n o m o u s P r e f e c t u r e , G u i z h o u P r o v i n c e , C h i n a 1. Schematic diagram of antenna 2. Specifications Center of frequency 433.92MHz Antenna bandwidth 433.92MHz Antenna gain 1.8 dBi VSWR 1.4 Polarization direction Linear polarization Radiation direction Omnidirectional Input impedance 50Ω 3. Antenna characteristics VSWR

Page 1 of 2 FCC ID: 2BRB7-RF-17KEY Test Photo Page 2 of 2