2ASNS58FTwo Way Radio

MIC RB58F USER’S MANUAL Contents Main Features.............................................................................................. Accessories List........................................................................................... Getting to Know Your Radio ....................................................................... Key Functions............................................................................................... Functions...................................................................................................... CDS and DCS List...................................................................................... Specifications............................................................................................. Troubleshooting ......................................................................................... WARNING.................................................................................................. 1 1 4 4 9 18 21 21 23 Download Mobile Programming APP Go to your mobile app store (App Store/Google Play), search for "RETEVIS", downloadandinstalltheoƽcialAPP.Afterinstallation,turnontheBluetooth functionofthewalkie-talkie,pairandconnectthedeviceviaAPPBluetooth, andyoucanconǁgureparameterssuchasfrequencyandchannel. Android: iOS: Download PC Programming Software OpentheoƽcialRETEVISwebsite,gototheDownload-Softwaresectionin themenubar,ǁndtheprogrammingsoftwareforyourmodelinthelist, andclick[Download].You'llreceivethedownloadlinkinyouremailshoDžly. Alternatively,youcanclickthelinktodownloaddirectly. https://www.retevis.com/downloads/software You can also scan the QR code below to download the APP directly. RB58F Product Manualv Main Features ScramblingLoneWorkerRogerBeepCustomChannelName Data Transfer/Data Cloning One-Touch GroupCall Multiple Alarm Modes Scan SmaDžPower Save Voice Prompt Bluetooth NOAA WeatherAleDž BluetoothApp Notice to Users Unpacking Inspection Beforeusingthedevice,pleaseopenthepackagingboxandcarefullycheck thecontentslistedinthetablebelow.Ifanyitemismissingordamaged duringtranspoDž,contactthecarrieroryourdealerimmediately. Accessories List Quantity 2 2 1 2 2 1 Item Radio BatteLj Type-CChargingCable BeltClip Lanyard User Manual BatteLjInformation Charging Precautions Please charge new batteries or batteries that have not been used for a long timebeforeuse.Twoorthreecharge/dischargecycleswillbringthebatteLj 1 tooptimumcapacity.WhenbatteLjpowerislow,rechargeorreplacethe batteLj. Don'tfullydrain:AimtorechargewhenthebatteLjhitsabout20%for batteLj,keepingitabovecriticallevels. Don'tstorebatteriesempty;chargethemto60-80%forideallong-term storagetoextendstorageperiods. IfyourdeviceorbatteLjisnotusedforlongerthansevendays,please peDŽormregularmaintenancechecksandrechargethebatteLjperiodicallyto maintainoptimalbatteLjlevels.Followingtheseguidelineswillnotonly protectbatteLjlifebutalsoensurethatdevicescanreturntoactiveduty withoutissue. EliminatingtheRisk,keepawayfromtheǃammablematerials,heatsources andignitionsourceswhileabatteLjischarged.Chargingshouldonlytake place in a well ventilated area and when someone is about to be aware and reacttoapotentialissue.Toreduceriskofǁre,abatteLjshouldnotbe chargedformorethan8hoursanddisconnectchargerfromlinevoltage(AC outlet) by removing main plug even if the batter is not completely charged.Don'tleaveadeviceunattendedwhilecharging.Disconnectthe chargerwhenthedeviceisfullycharged:donotoverchargethedevice. ApprovedBatteLjTypes Useonlybatteriesspeciǁedbythemanufacturer.Usingotherbatteriesmay causeexplosionandpersonalinjuLj. Note: 1.DonotshoDž‑circuitbatteLjterminalsordisposeofthebatteLjinǁre.Do notdisassemblethebatteLjpackcasing. Chargingambienttemperatureshouldbebetween0°Cand40°C. Charging2.outsidethisrangemayaƺectpropercharging.Turnoƺthe transceiverwhilecharging.Usingthetransceiverduringchargingmay inteDŽerewithpropercharging. 3.DonotrepeatedlyunplugthepowerorbatteLjduringchargingtoavoid interruptingthechargingprocess.Toreduceriskofǁre,abatteLjshouldnot bechargedformorethan6hoursanddisconnectchargerfromlinevoltage (ACoutlet)byremovingmainplugevenifthebatterisnotcompletely charged. 4.Ifoperatingtimeissigniǁcantlyreducedafterafullcharge,thebatteLjhas reachedtheendofitslife–replaceit. 5.DonotremoveandreinseDžafullychargedbatteLjforrecharging,asthis mayshoDženbatteLjlifeorcausedamage. 6.DonotchargeawetbatteLjortransceiver.DLjwithacleanclothbefore chargingtoavoidhazards. Warning: AllbatteriescancausepropeDžydamageorpersonalinjuLjifconductive metals(jewelLj,keys,chainnecklaces,etc.)touchtheterminals.These 2 conductivemetalsmaycreateashoDžcircuitandgeneratehighheat.Handle anybatteLjwithcare,especiallywhenplacingitintoapocket,purse,orother containerwithmetalobjects. Type-CChargingProcedure.Followthestepsbelow: InseDžastandard5V/1Aadapterintoapoweroutlet. PlacethetransceiverwiththebatteLjinstalledintothechargingcradle. EnsurethatthebatteLjmakespropercontactwiththechargingpins.The charger indicator will light red, and the radio will display a red icon, indicatingthatcharginghasstaDžed.ForType-Ccharging,inseDžtheType-C plugofthechargingcableintotheType-CpoDžontherightsideoftheradio. Theradiowilldisplayarediconwhilecharging.Whenfullycharged,the iconwillturngreen. Chargingtypicallytakesapproximately5–6hours.Whenthechargingdock indicator turns gre…

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Shenzhen Retevis Technology Co., Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name: Two Way Radio FCC ID: 2ASNS58F Model(s): RB58F 2.911(d)(5)(i) Equipment Type We, [Shenzhen Retevis Technology Co., Ltd.] (“the applicant”) certify that the equipment for which authorization is sought through certification is not: • Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules. • Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Dongfang Shen Date: 2026-07-17 Title and Company name: Manager / Shenzhen Retevis Technology Co., Ltd. NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Shenzhen Retevis Technology Co., Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.2 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name: Two Way Radio FCC ID: 2ASNS58F Model(s): RB58F 2.911(d)(5)(ii) Applicant filing We, [Shenzhen Retevis Technology Co., Ltd.] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to § 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Dongfang Shen Date: 2026-07-17 Title and Company name: Manager / Shenzhen Retevis Technology Co., Ltd. NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

ShenzhenRetevisTechnologyCo.,Ltd 7/F,13-C,ZhonghaixinScience&TechnologyPark,No.12Ganli6thRoad,JihuaStreet,LonggangDistrict,Shenzhen,China FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 June22,2026 U.S.AgentDesignation ShenzhenRetevisTechnologyCo.,Ltdacknowledgestheirconsentforthefollowingcontactlocatedinthe UnitedStatestoactastheiragentforserviceofprocessfortheequipmentforwhichauthorizationissought(FCC ID:2ASNS58F): NameandcompanyofU.S.agent:RETEVISINC PhysicalU.S.addressofagent:1733EBROOKPORTSTCovina,CA91724UnitedStates FRNofU.S.agent:0033657701 EmailaddressofU.S.agent:[email protected] RETEVISINCacknowledgestheirobligationtoacceptserviceofprocessonbehalfofShenzhenRetevis TechnologyCo.,Ltd ShenzhenRetevisTechnologyCo.,LtdwiththeFRN[0028298024]acceptsitsobligationtomaintainanagent forserviceofprocessintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,ortheconclusionofany Commission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheverislater. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirementslistedunder§ 2.911(d)(7). TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRaswellasKDB 986446D01. Anexpirationdateforthisletterdoesnotexist.IncasetheU.S.agentchanges,thegranteeisobligatedtonotify theFCCwithin30daysviathegrantingTCB. Sincerely, Signature DongfangShen GeneralManager ShenzhenRetevisTechnologyCo.,Ltd Signature LiuyeLi Manager RETEVISINC 4 8 _ [ m o d e l ] U S _ A g e n t _ 2 . 9 1 1 ( d ) ( 7 ) - U , V 0 5

Shenzhen Retevis Technology Co., Ltd. Letter of Authorization Company: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name: Two Way Radio Model Number: RB58F FCC Identifier: 2ASNS58F We authorize MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the above named equipment. Any individual within MiCOM Labs is authorized to act on our behalf and take action on the application. We declare that MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Name: Dongfang Shen Date: 2026-07-17 Title: Manager

Shenzhen Retevis Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2026-07-17 Subject; Request for Confidentiality FCC ID: 2ASNS58F To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Dongfang Shen Title: Manager

Shenzhen Retevis Technology Co., Ltd. Declaration of Non Removable Antenna Company: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name: Two Way Radio Model Number: RB58F FCC Identifier: 2ASNS58F We, [Shenzhen Retevis Technology Co., Ltd. ], hereby confirm that the antenna of RB58F product is fixed with special adhesive, permanently non removable, and complies with FCC regulations and requirements. Your sincerely, Name: Dongfang Shen Date: 2026-07-29 Title: Manager

7.1. External Photos

修改标记区域 修改人 日期 修改内容 型号RB58F 80g不干胶贴纸 刘海涛2026年6月13日24.8×24.8mm 覆哑膜单色印刷 美版机身标 物料 材质 尺寸 工艺 颜色 设计 日期 审核 批准 日期 日期 单位mm1 比例1:1A0 编号 页码 版本 公差±1 技术要求： 1.印刷必须清晰不得有断线、模糊不清等不良现象； 2.背胶必须耐温80摄氏度且不会翘起； 3.标签必须符合“SPI环境管制物质技术标准（SGP-0401)”最新版。 4.公差为±0.5mm。 Shenzhen Retevis Technology Co.,Ltd. 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China S/N: 260613R0581100001 Model: RB58F Two Way Radio FCC ID: 2ASNS58F Type C input: 5V 1A S/N说明：(未作标注部分固定不变) 260613 R0581100001 第1-6位：生产年月，260613代表2026年06月13日； 须流水变化，以实际生产年月为准 第12位： 当月生产批次，范围是1-9， 以实际生产批次为准 第13-17位：生产的流水号，须滚动变化， 范围是00001-99999； 次月流水号重新以00001开始 并进行滚动变化；

7.2. Internal Photos FRS ANT BT ANT

TEST REPORT For SAR Report No......................................... : CHTW26075006 Project No ........................................ : SHT2605034703W FCC ID ............................................. : 2ASNS58F Applicant’s name ............................. : Shenzhen Retevis Technology Co., Ltd. Address ............................................ : 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name .................................. : Two Way Radio Trade Mark....................................... : RETEVIS Model No.......................................... : RB58F Listed Model(s) ................................ : - Standard .......................................... : FCC 47 CFR Part2.1093 ANSI/IEEE Std C95.1-1992 IEEE Std 1528-2013 Date of receipt of test sample..........: 2026/5/18 Date of testing.............................: 2026/7/2 Date of issue...............................: 2026/7/14 Result ................... ........................: PASS Compiled by (Position+Printed name+Signature) : File administrator Caspar Chen Supervised by (Position+Printed name+Signature) : Project Engineer Xiaodong Zhao Approved by (Position+Printed name+Signature) : RF Manager Xu Yang Testing Laboratory Name ............. : Shenzhen Huatongwei International Inspection Co., Ltd. Address ............................................ : Building 7, Baiwang Idea Factory, No.1051, Songbai Road, Yangguang Community, Xili Subdistrict, Nanshan District, Shenzhen, Guangdong, China Test Report Form No. ........................ : R0066 Test Report Form(s) Originator ......... : Shenzhen Huatongwei International Inspection Co., Ltd. Master TRF ........................................ : Dated 2025-07 Shenzhen Huatongwei International Inspection Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Huatongwei International Inspection Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Huatongwei International Inspection Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context.The test report merely correspond to the test sample.The authenticity of this Test Report and its contents can be verified by contacting the Laboratory, responsible for this Test Report. Report No.: CHTW26075006 Page 2 of 28 Contents 1. Statement of Compliance 3 2. Test Standards and Report version 4 2.1. Test Standards 4 2.2. Report version 4 3. Summary 5 3.1. Client Information 5 3.2. Product Description 5 3.3. Radio Specification Description 5 3.4. Test frequency list 6 3.5. Testing Laboratory Information 6 3.6. Environmental conditions 6 4. Equipments Used during the Test 7 5. Measurement Uncertainty 8 6. SAR Measurements System Configuration 9 6.1. SAR Measurement Set-up 9 6.2. DASY5 E-field Probe System 10 6.3. Phantoms 11 6.4. Device Holder 11 7. SAR Test Procedure 12 7.1. Scanning Procedure 12 7.2. Data Storage and Evaluation 14 8. Position of the wireless device in relation to the phantom 16 8.1. Front-of-face 16 8.2. Body Position 16 9. Dielectric Property Measurements & System Check 17 9.1. Tissue Dielectric Parameters 17 9.2. SAR System Validation 18 9.3. System Check 18 10. SAR Exposure Limits 21 11. RF Exposure Conditions (Test Configurations) 22 11.1. Antenna Location 22 11.2. Standalone SAR test exclusion considerations 23 12. Power Measurement Results and Tune-up 24 13. SAR Measurement Results 25 14. Simultaneous Transmission analysis 26 15. Test Setup Photos 27 16. External Photos of the EUT 28 Report No.: CHTW26075006 Page 3 of 28 1. Statement of Compliance Maximum Reported SAR (W/kg @1g) RF Exposure Conditions FRS Front-of-face(Dist.= 25mm) 0.263 Body-worn(Dist.= 0mm) 0.642 Note: 1. This device is in compliance with Specific Absorption Rate (SAR) for general population/uncontrolled exposure limits specified in FCC 47 CFR part 2 (2.1093) and IEEE Std C95.1. 2. This device had been tested in accordance with the measurement methods and procedures specified in IEEE 1528 and FCC KDB publications. 3. The above SAR values are all based on a 75% duty cycle. Report No.: CHTW26075006 Page 4 of 28 2. Test Standards and Report version 2.1. Test Standards The tests were performed according to following standards: FCC 47 Part 2.1093: Radiofrequency Radiation Exposure Evaluation:Portable Devices ANSI/IEEE C95.1-1992: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz IEEE Std 1528-2013: IEEE Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques. FCC published RF exposure KDB procedures: KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01r04: SAR Measurement Requirements for 100 MHz to 6 GHz KDB 865664 D02 RF Exposure Reporting v01r02: RF Exposure Compliance Reporting and Documentation Considerations KDB 447498 D04 Interim General RF Exposure Guidance v01: Mobile and Portable Device RF Exposure Procedures and Equipment Authorization Policies TCB workshop: April, 2019; Page 19, Tissue Simulating Liquids (TSL) 2.2. Report version Revision No. Date of issue Description N/A 2026-07-14 Original Report No.: CHTW26075006 Page 5 of 28 3. Summary 3.1. Client Information Applicant: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Manufacturer: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China 3.2. Product Description Main unit Name of EUT: Two Way Radio Trade Mark: RETEVIS Model No.: RB58F Listed Model(s): - …

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Appendix Report Project No. SHT2605034703W Test sample No. YPHT26050347002 Model No. RB58F Start test date 2026/7/2 Finish date 2026/7/2 Temperature 23.2°C Humidity 53.7% Test EngineerAuditor Appendix clause Test ItemResult APower Measurement ResultsPASS BSAR Measurement ResultsPASS Appendix:1 of 3 Project No.:SHT2605034703W Appendix A:Power Measurement Results FRS Mode Channel Separation Frequency ERP (dBm) Tune up limit (dBm) ChannelMHz Analog12.5kHz CH4462.6375 31.61 32.00 CH11467.6375 25.76 26.00 Bluetooth ModeChannel Frequency (MHz) Power (dBm) Tune-up limit (dBm) Duty Cycle EDR GFSK 02402-5.12 -5.00 77.07% 392441-4.34 -4.00 77.07% 782480-4.47 -4.00 76.80% π/4QPSK 02402-4.54 -4.50 77.07% 392441-3.89 -3.50 76.80% 782480-3.86 -3.50 77.07% BLE 1MGFSK 02402-0.30 0.00 85.60% 1924400.08 0.50 85.60% 392480-0.14 0.00 85.60% BLE 2MGFSK 02402-0.33 0.00 43.20% 1924400.12 0.50 43.20% 392480-0.16 0.00 43.20% Appendix A: 2/3 Project No.:SHT2605034703W Appendix B:SAR Measurement Results Front-of-face Mode Channel Separation Test Position Test Distance (mm) Frequency ERP (dBm) Tune up limit (dBm) Tune up scaling factor Power Drift(dB) Measured SAR(1g) Report SAR(1g) 75% Duty SAR(1g) Plot No. CHMHz(W/kg)(W/kg)(W/kg) Analog12.5kHzFront25 CH4462.6375 31.61 32.00 1.094 -0.19 0.321 0.351 0.263 1 CH11467.6375 25.76 26.00 1.057 -0.02 0.205 0.217 0.162 - Body-worn Mode Channel Separation Test Position Test Distance (mm) Frequency ERP (dBm) Tune up limit (dBm) Tune up scaling factor Power Drift(dB) Measured SAR(1g) Report SAR(1g) 75% Duty SAR(1g) Plot No. CHMHz(W/kg)(W/kg)(W/kg) Analog12.5kHz Rear (With Belt clip) 0 CH4462.6375 31.61 32.00 1.094 -0.02 0.782 0.855 0.642 2 CH11467.6375 25.76 26.00 1.057 -0.04 0.447 0.472 0.354 - Appendix B: 3/3 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR LabDate: 2026/7/2 Analog-12.5kHz Front-of-face Communication System: UID 0, Analog (0); Frequency: 462.637 MHz;Duty Cycle: 1:1 Medium parameters used: f = 463 MHz; σ = 0.871 S/m; ε r = 42.109; ρ = 1000 kg/m 3 Phantom section: Flat Section Ambient Temperature:23.2°C;Liquid Temperature:22.3°C; DASY Configuration: lProbe: EX3DV4 - SN7494; ConvF(11.51, 11.51, 11.51) @ 462.637 MHz; Calibrated: 2025/11/ 27 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lE lectronics: DAE4 Sn1549; Calibrated: 2026/5/ 8 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.4(1535); SEMCAD X 14.6.14(7501) Front 25mm/CH4/Area Scan (7x20x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (measured) = 0.430 W/kg Front 25mm/CH4/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 21.97 V/m; Power Drift = -0.19 dB Peak SAR (extrapolated) = 0.501 W/kg SAR(1 g) = 0.321 W/kg; SAR(10 g) = 0.231 W/kg Smallest distance from peaks to all points 3 dB below: Larger than measurement grid (> 16 mm) Ratio of SAR at M2 to SAR at M1 = 64.7% Maximum value of SAR (measured) = 0.427 W/kg 0 dB = 0.427 W/kg = -3.70 dBW/kg Appendix D: SAR Test Data Plots Plot No.1 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR LabDate: 2026/7/2 Analog-12.5kHz Body-worn Communication System: UID 0, Analog (0); Frequency: 462.637 MHz;Duty Cycle: 1:1 Medium parameters used: f = 463 MHz; σ = 0.871 S/m; ε r = 42.109; ρ = 1000 kg/m 3 Phantom section: Flat Section Ambient Temperature:23.2°C;Liquid Temperature:22.3°C; DASY Configuration: lProbe: EX3DV4 - SN7494; ConvF(11.51, 11.51, 11.51) @ 462.637 MHz; Calibrated: 2025/11/ 27 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lE lectronics: DAE4 Sn1549; Calibrated: 2026/5/ 8 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.4(1535); SEMCAD X 14.6.14(7501) Back(With Belt Clip) 0mm/CH4/Area Scan (7x20x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (measured) = 1.01 W/kg Back(With Belt Clip) 0mm/CH4/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 33.46 V/m; Power Drift = -0.02 dB Peak SAR (extrapolated) = 1.16 W/kg SAR(1 g) = 0.782 W/kg; SAR(10 g) = 0.550 W/kg Smallest distance from peaks to all points 3 dB below: Larger than measurement grid (> 16 mm) Ratio of SAR at M2 to SAR at M1 = 67.2% Maximum value of SAR (measured) = 1.02 W/kg 0 dB = 1.02 W/kg = 0.09 dBW/kg Appendix D: SAR Test Data Plots Plot No.2 Appendix E: DAE and Probe Calibration Certificate 1 of 12 1.1. DAE4 Calibration Certificate Appendix E: DAE and Probe Calibration Certificate 2 of 12 Appendix E: DAE and Probe Calibration Certificate 3 of 12 Appendix E: DAE and Probe Calibration Certificate 4 of 12 1.2. Probe Calibration Certificate Appendix E: DAE and Probe Calibration Certificate 5 of 12 Appendix E: DAE and Probe Calibration Certificate 6 of 12 Appendix E: DAE and Probe Calibration Certificate 7 of 12 Appendix E: DAE and Probe Calibration Certificate 8 of 12 Appendix E: DAE and Probe Calibration Certificate 9 of 12 Appendix E: DAE and Probe Calibration Certificate 10 of 12 Appendix E: DAE and Probe Calibration Certificate 11 of 12 Appendix E: DAE and Probe Calibration Certificate 12 of 12 Appendix F: Dipole Calibration Certificate 1 of 7 1.1. D450V3 Dipole Calibration Certificate Appendix F: Dipole Calibration Certificate 2 of 7 Appendix F: Dipole Calibration Certificate 3 of 7 Appendix F: Dipole Calibration Certificate 4 of 7 Appendix F: Dipole Calibration Certificate 5 of 7 Appendix F: Dipole Calibration Certificate 6 of 7 Appendix F: Dipole Calibration Certificate 7 of 7 Extended Dipole Calibrations Referring to KDB865664 D01, if dipoles are verified in return loss (<-20dB, within 20% of prior calibration), and in impedance (within 5 ohm of prior calibration), the annual calibration is not necessary and the calibration interval can be extended. Head-450 Date of measurement Return-loss (dB) Delta (%) Real Impedance (ohm) Delta (ohm) Imaginary impedance (ohm) Delta (ohm) 2024-01-24 -21.5 58.4 -3.50 2025-01-17 -22.3 3.72 56.3 2.1 -5.19 1.69 2026-01-13 -22.5 4.65 56.2 2.2 -4.96 1.46 The return loss is <-20…

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TEST REPORT Report No......................................... : CHTW26065084 Project No ........................................ : SHT2605034702W FCC ID ............................................. : 2ASNS58F Applicant’s name ............................. : Shenzhen Retevis Technology Co., Ltd. Address ............................................ : 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name .................................. : Two Way Radio Trade Mark....................................... : RETEVIS Model No.......................................... : RB58F Listed Model(s) ................................ : - Standard .......................................... : FCC CFR Title 47 Part 95 Subpart B Date of receipt of test sample..........: 2026/5/19 Date of testing.............................: 2026/5/20 - 2026/7/10 Date of issue...............................: 2026/7/10 Result ................... ........................: PASS Compiled by (Position+Printed name+Signature) : File administrator Xiaodong Zhao Supervised by (Position+Printed name+Signature) : Project Engineer Caspar Chen Approved by (Position+Printed name+Signature) : RF Manager Xu Yang Testing Laboratory Name ............. : Shenzhen Huatongwei International Inspection Co., Ltd. Address ............................................ : Building 7, Baiwang Idea Factory, No.1051, Songbai Road, Yangguang Community, Xili Subdistrict, Nanshan District, Shenzhen, Guangdong, China Test Report Form No. ........................ : R0066 Test Report Form(s) Originator ......... : Shenzhen Huatongwei International Inspection Co., Ltd. Master TRF ........................................ : Dated 2025-07 Shenzhen Huatongwei International Inspection Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Huatongwei International Inspection Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Huatongwei International Inspection Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context.The test report merely correspond to the test sample.The authenticity of this Test Report and its contents can be verified by contacting the Laboratory, responsible for this Test Report. Report No.: CHTW26065084 Page 2 of 31 Contents 1. TEST S T AN D AR D S A N D R E P O R T V E R S I O N 3 1.1. Test Standards 3 1.2. Report version 3 2. TEST DESCRIPTION 4 3. SUMMARY 5 3.1. Client Information 5 3.2. Product Description 5 3.3. Radio Specification Description 5 3.4. Testing Laboratory Information 6 4. TEST CONFIGURATION 7 4.1. Test frequency list 7 4.2. Test mode 7 4.3. Support unit used in test configuration and system 8 4.4. Testing environmental condition 8 4.5. Measurement uncertainty 8 4.6. Equipment Used during the Test 9 5. TEST CONDITIONS AND RESULTS 11 5.1. Carrier Output Power (ERP) 11 5.2. 99% Occupied Bandwidth & 26dB Bandwidth 12 5.3. Emission Mask 13 5.4. Modulation Limit 14 5.5. Audio Frequency Response 15 5.6. Audio Low Pass Filter Response 17 5.7. Frequency stability VS Temperature 18 5.8. Frequency stability VS Voltage 19 5.9. Transmit Radiated Spurious Emission 20 6. TEST SETUP PHOTOS 25 7. EXTERANAL AND INTERNAL PHOTOS 27 7.1. External Photos 27 7.2. Internal Photos 29 8. APPENDIX REPORT 31 Report No.: CHTW26065084 Page 3 of 31 1. TEST STAND ARDS AND REPORT VERSION 1.1. Test Standards The tests were performed according to following standards: FCC CFR Title 47 Part 95 Subpart B: Family Radio Service (FRS) FCC Rules Part 2: Frequency allocations and radio treaty matters; General rules and regulations ANSI C63.26-2013: American National Standard for Compliance Testing of Transmitters Used in Licensed Radio Services ANSI C63.4-2014: American National Standard for Methods of Measurement of Radio-Noise Emissio…

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