U7GBBOXGODigital Transceiver

Warning: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. For a Class B digital device or peripheral, the instructions furnished to the user shall include the following or similar statement, placed in a prominent location in the text of the manual: NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help. This radio is designed for and classified as “ Occupational/Controlled Use Only” , meaning it must beused only during the course of employment by individuals aware of the hazards, and the ways to minimize such hazards; NOT intended for use in an General population/uncontrolled environment. – DO NOT operate the radio without a proper antenna attached, as this may damage the radio and may also cause you to exceed RF exposure limits. A proper antenna is the antenna supplied with this radio by the manufacturer or an antenna specifically authorized by the manufacturer for use with this radio. – DO NOT transmit for more than 50% of total radio use time, more than 50% of the time can cause RF exposure compliance requirements to be exceeded. – This transmitter may operate with the antenna(s) documented in this filing in Push- to-Talk and body-worn configurations. RF exposure compliance is limited to the specific belt-clip and accessory configurations as documented in this filing and the separation distance between user and the device or its antenna shall be at least 2.5 cm. The maximum duty cycle supported by the device is 50%.

Klein Electronics, Inc. 349 N. Vinewood St, Escondido, California, USA 92029 Tel.: 800.959.2899 Fax: - Attestation letter FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, We, Klein Electronics, Inc. hereby declare that our product: Digital Transceiver, FCC ID: U7GBBOXGO is capable of supporting a voice channel and a minimum data rate of 4800 bits per second per 6.25 kHz of channel bandwidth. DMR interphone’s bandwidth is 12.5 kHz, and it has a double time slot, one is the speech time slot, one is the data time slot, just language sequence is satisfied with 4800 bps/6.25 kHz BW. For Part 90 frequency user, the radio is disabled 25kHz channel bandwidth mode by radio firmware at factory in order to comply with FCC mandate for part 90 frequencies. Sincerely, Michael Lopez Signature: 2020-05-25

Klein Electronics, Inc. 349 N. Vinewood St, Escondido, California, USA 92029 Tel.: 800.959.2899 Fax: - Date: 2020-05-25 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Extended Frequencies Justification Dear Sir/Madam, The Radio with FCC ID: U7GBBOXGO This transmitter was designed to operate in following frequency ranges: 400-470MHz To operate in the USA in the frequency range 400MHz-406MHz, 406.1MHz-470MHz. the frequency ranges 406MHz-406.1MHz are disabled. Third party is not able to programming the transmit and receive channels. To aid equipment authorization in other countries which accept the United States FCC Grant for Certification, Klein Electronics, Inc. is requesting that the FCC lists the frequencies 400~406MHz,406.1~470MHz under FCC Rule Part 90 on the FCC Grant. Klein Electronics, Inc. attests that the Digital Transceiver will not be marketed to USA users with the frequency band which is not allowed by the rule part 90. Per the FCC’s KDB634817 guidance, as an alternative to listing the exact frequencies, we acknowledge that it’s a violation of the FCC Rules if this device operates on unauthorized frequencies. Frequency Range (MHz) FCC Rule Part 400-406 For Federal 406.1-420 90 420-421 90 421-430 90 430-450 90 450-470 90 Sincerely Yours, Signature: Michael Lopez

2020-05-25 NemkoCanadaInc 303RiverRoad Ottawa,Ontario,Canada K1V1H2 Attn:DirectorofCertification AuthoritytoActasAgent Onourbehalf,Iappoint ShenzhenHuatongweiInternationalInspectionCo., Ltd./1/F,Bldg3,HongfaHi-techIndustrialPark,GenyuRoad,Tianliao, Gongming,Shenzhen,China / HansHu ,.toactasouragentinthepreparationof thisapplicationforequipmentcertification.Icertifythatsubmitteddocumentsproperly describethedeviceorsystemforwhichequipmentcertificationissought.Ialsocertify thateachunitmanufactured,importedormarketed,asdefinedintheFederal CommunicationsCommission’sregulationswillhaveaffixedtoitalabelidenticalto thatsubmittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonour behalf,Iacknowledgethatallresponsibilityforcomplyingwiththetermsandconditions forcertification,asspecifiedbyNemkoCanadaInc,stillresideswith KleinElectronics, Inc./349N.VinewoodSt,Escondido,California,USA92029. Dated this May25,2020 Agencyagreementexpirationdate: May25,2021 By: MichaelLopez SignaturePrinted Title: ProductManager Onbehalfof: KleinElectronics,Inc. Telephone: 800.959.2899

2020-05-25 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: U7GBBOXGO Product Name: Digital Transceiver Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics Block diagram  Operation description PCB Layout  PCB Placement BOM  Tune up These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Dated this May 2 5, 2020 By: Michael Lopez Signat ure Pr inted Titl e: Prod uct Manager Onbeha lfof: Klein Elec tronics, Inc. Telep hone: 80 0.959.2899

Label & Label Location

Internal Photos of the EUT

Page: 1 of 29 TEST REPORT Report No. ....................................... : CHTEW20050088 Report verificaiton: Project No. ...................................... : SHT2005015002EW FCC ID ............................................. : U7GBBOXGO Applicant’s name ........................... : Klein Electronics, Inc. Address ............................................ : 349 North Vinewood Street, Escondido, California, USA 92029 Test item description ..................... : Digital Transceiver Trade Mark ....................................... : Blackbox Model/Type reference ...................... : Go! Listed Model(s) ................................ : - Standard ......................................... : FCC 47 CFR Part2.1093 IEEE Std C95.1, 1999 Edition IEEE 1528: 2013 Date of receipt of test sample.........: May 15, 2020 Date of testing.............................: May 16, 2020- May 20, 2020 Date of issue...............................: May 21, 2020 Result .................. ........................: PASS Compiled by ( position+printed name+signature) . : File administrators: Fanghui Zhu Supervised by ( position+printed name+signature) . : Test Engineer: Xiaodong Zhao Approved by ( position+printed name+signature) . : Manager: Hans Hu Testing Laboratory Name ............. : Shenzhen Huatongwei International Inspection Co., Ltd Address ............................................ : 1/F, Bldg 3, Hongfa Hi-tech Industrial Park, Genyu Road, Tianliao, Gongming, Shenzhen, China 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. Report No: CHTEW20050088 Page: 2 of 29 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V02 (2020-05) 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. Environmental conditions 7 4. Equipments Used during the Test 8 5. Measurement Uncertainty 9 6. SAR Measurements System Configuration 10 6.1. SAR Measurement Set-up 10 6.2. DASY5 E-field Probe System 11 6.3. Phantoms 12 6.4. Device Holder 12 7. SAR Test Procedure 13 7.1. Scanning Procedure 13 7.2. Data Storage and Evaluation 15 8. Position of the wireless device in relation to the phantom 17 8.1. Front-of-face 17 8.2. Body Position 17 9. Dielectric Property Measurements & System Check 18 9.1. Tissue Dielectric Parameters 18 9.2. SAR System Validation 19 9.3. System Check 20 10. SAR Exposure Limits 23 11. Conducted Power Measurement Results 24 12. Maximum Tune-up Limit 25 13. SAR Measurement Results 26 14. Test Setup Photos 28 15. External and Internal Photos of the EUT 29 Report No: CHTEW20050088 Page: 3 of 29 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V02 (2020-05) 1. Statement of Compliance Highest Reported SAR (W/kg) RF Exposure Conditions TNF 1g Head(Dist.= 25mm) 3.23 1g Body-worn(Dist.= 0mm) 3.99 This device is in compliance with Specific Absorption Rate (SAR) for general population/uncontrolled exposure limits (1.6 W/kg) specified in FCC 47 CFR part 2 (2.1093) and ANSI/IEEE C95.1-1992, and had been tested in accordance with the measurement methods and procedures specified in IEEE 1528-2013 and FCC KDB publications. Report No: CHTEW20050088 Page: 4 of 29 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V02 (2020-05) 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 IEEE Std C95.1, 1999 Edition: 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 D01 General RF Exposure Guidance v06: Mobile and Portable Device RF Exposure Procedures and Equipment Authorization Policies KDB 643646 D01:SAR Test for PTT Radios v01r03: SAR Test Reduction Considerations for Occupational PTT Radios TCB workshop: April, 2019; Page 19, Tissue Simulating Liquids (TSL) 2.2. Report version Revision No. Date of issue Description N/A 2020-05-21 Original Report No: CHTEW20050088 Page: 5 of 29 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V02 (2020-05) 3. Summary 3.1. Client Information Applicant: Klein Electronics, Inc. Address: 349 North Vinewood Street, Escondido, California, USA 92029 Manufacturer: Klein Electronics, Inc. Address: 349 North Vinewood Street, Escondido, California, USA 92029 3.2. Product Description Main unit Name of EUT: Digital Transceiver Trade mark: Blackbox Model/Type reference: Go! Listed model(s): - Device Category: Portable RF Exposure Environment: Occupational/Controlled Power supply: DC 7.5V Test sample No.: YPHT20050150011 Hardware version: GO V1.0.3.13 Software version: DMR_UHF V1.2 Device Dimension: Overall (Length…

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Date: 5/20/2020 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR Lab ANT1 Analog CH3 12.5kHz Head Communication System: UID 0, Analog (0); Frequency: 435 MHz;Duty Cycle: 1:1 Medium parameters used: f = 435 MHz; σ = 0.895 S/m; ε r = 45.516; ρ = 1000 kg/m 3 Phantom section: Flat Section Ambient Temperature:22.6°C;Liquid Temperature:22.4°C; DASY Configuration: lProbe: EX3DV4 - SN3842; ConvF(9.96, 9.96, 9.96) @ 435 MHz; Calibrated: 1/30/2020 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lElectronics: DAE4 Sn1549; Calibrated: 4/4/2020 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.2(1495); SEMCAD X 14.6.12(7450) Front/CH 3/Area Scan (61x201x1): Interpolated grid: dx=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 8.10 W/kg Front/CH 3/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 92.75 V/m; Power Drift = 0.12 dB Peak SAR (extrapolated) = 9.46 W/kg SAR(1 g) = 6.08 W/kg; SAR(10 g) = 4.45 W/kg Maximum value of SAR (measured) = 8.04 W/kg 0 dB = 8.04 W/kg = 9.05 dBW/kg Appendix A: SAR Test Data Plots Plot No.1 Date: 5/20 /2020 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR Lab ANT1 Digtal CH3 12.5kHz Head Communication System: UID 0, Digital (0); Frequency: 435 MHz;Duty Cycle: 1:2.1192 Medium parameters used: f = 435 MHz; σ = 0.895 S/m; ε r = 45.516; ρ = 1000 kg/m 3= Phantom section: Flat Section Ambient Temperature:22.2°C;Liquid Temperature:22.0°C; DASY Configuration: lProbe: EX3DV4 - SN3842; ConvF(9.96, 9.96, 9.96) @ 435 MHz; Calibrated: 1/30/2020 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lElectronics: DAE4 Sn1549; Calibrated: 4/4/2020 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.2(1495); SEMCAD X 14.6.12(7450) Front/CH 3/Area Scan (61x201x1): Interpolated grid: dx=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 4.45 W/kg Front/CH 3/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 70.62 V/m; Power Drift = -0.17 dB Peak SAR (extrapolated) = 5.30 W/kg SAR(1 g) = 3.3 W/kg; SAR(10 g) = 2.37 W/kg Maximum value of SAR (measured) = 4.40 W/kg 0 dB = 4.40 W/kg = 6.43 dBW/kg Appendix A: SAR Test Data Plots Plot No.2 Date: 5/20/2020 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR Lab ANT1 Analog CH3 12.5kHz Body-worn Communication System: UID 0, Analog (0); Frequency: 435 MHz;Duty Cycle: 1:1 Medium parameters used: f = 435 MHz; σ = 0.895 S/m; ε r = 45.516; ρ = 1000 kg/m 3 Phantom section: Flat Section Ambient Temperature:22.8°C;Liquid Temperature:22.6°C; DASY Configuration: lProbe: EX3DV4 - SN3842; ConvF(9.96, 9.96, 9.96) @ 435 MHz; Calibrated: 1/30/2020 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lElectronics: DAE4 Sn1549; Calibrated: 4/4/2020 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.2(1495); SEMCAD X 14.6.12(7450) Rear/CH 3/Area Scan (61x201x1): Interpolated grid: dx=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 11.5 W/kg Rear/CH 3/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 101.3 V/m; Power Drift = -0.12 dB Peak SAR (extrapolated) = 16.9 W/kg SAR(1 g) = 7.5 W/kg; SAR(10 g) = 5.89 W/kg Maximum value of SAR (measured) = 11.3 W/kg 0 dB = 11.3 W/kg = 11.55 dBW/kg Appendix A: SAR Test Data Plots Plot No.3 Date: 5/20 /2020 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR Lab ANT1 Digtal CH3 12.5kHz Body-worn Communication System: UID 0, Digital (0); Frequency: 435 MHz;Duty Cycle: 1:2.1192 Medium parameters used: f = 435 MHz; σ = 0.895 S/m; ε r = 45.516; ρ = 1000 kg/m 3= Phantom section: Flat Section Ambient Temperature:22.4°C;Liquid Temperature:22.2°C; DASY Configuration: lProbe: EX3DV4 - SN3842; ConvF(9.96, 9.96, 9.96) @ 435 MHz; Calibrated: 1/30/2020 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lElectronics: DAE4 Sn1549; Calibrated: 4/4/2020 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.2(1495); SEMCAD X 14.6.12(7450) Rear/CH 3/Area Scan (61x201x1): Interpolated grid: dx=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 6.61 W/kg Rear/CH 3/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 95.45 V/m; Power Drift = -0.10 dB Peak SAR (extrapolated) = 10.1 W/kg SAR(1 g) = 4.24 W/kg; SAR(10 g) = 3.35 W/kg Maximum value of SAR (measured) = 6.43 W/kg 0 dB = 6.43 W/kg = 9.26 dBW/kg Appendix A: SAR Test Data Plots Plot No.4 Appendix B: DAE and Probe Calibration Certificate 1 of 12 1.1. DAE4 Calibration Certificate Appendix B: DAE and Probe Calibration Certificate 2 of 12 Appendix B: DAE and Probe Calibration Certificate 3 of 12 Appendix B: DAE and Probe Calibration Certificate 4 of 12 1.2. Probe Calibration Certificate Appendix B: DAE and Probe Calibration Certificate 5 of 12 Appendix B: DAE and Probe Calibration Certificate 6 of 12 Appendix B: DAE and Probe Calibration Certificate 7 of 12 Appendix B: DAE and Probe Calibration Certificate 8 of 12 Appendix B: DAE and Probe Calibration Certificate 9 of 12

Appendix B: DAE and Probe Calibration Certificate 10 of 12 Appendix B: DAE and Probe Calibration Certificate 11 of 12 Appendix B: DAE and Probe Calibration Certificate 12 of 12 Appendix C: Dipole Calibration Certificate 1 of 9 1.1. D450V3 Dipole Calibration Certificate Appendix C: Dipole Calibration Certificate 2 of 9 Appendix C: Dipole Calibration Certificate 3 of 9 Appendix C: Dipole Calibration Certificate 4 of 9 Appendix C: Dipole Calibration Certificate 5 of 9 Appendix C: Dipole Calibration Certificate 6 of 9 Appendix C: Dipole Calibration Certificate 7 of 9 Appendix C: Dipole Calibration Certificate 8 of 9 Appendix C: Dipole Calibration Certificate 9 of 9 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 Date of measurement Return-loss (dB) Delta (%) Real Impedance (ohm) Delta (ohm) Imaginary impedance (ohm) Delta (ohm) 2018-02-23 -21.1 59.6 -0.2 2019-02-15 -21.8 -3.32 59.1 0.5 -0.8 0.6 2019-01-22 -21.8 -3.32 58.8 0.8 -0.5 0.3 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5ohm of prior calibration. Therefore the verification result should support extended calibration.

Page: 1 of 55 TEST REPORT Report No. ....................................... : CHTEW20050087 Report Verification: Project No. ...................................... : SHT2005015001EW FCC ID ............................................. : U7GBBOXGO Applicant’s name ........................... : Klein Electronics, Inc. Address ............................................ : 349 N. Vinewood St, Escondido, California, USA 92029 Test item description ..................... : Digital Transceiver Trade Mark ....................................... : Blackbox Model/Type reference ...................... : Go! Listed Model(s) ................................. : - Standard .......................................... : FCC CFR Title 47 Part 2 FCC CFR Title 47 Part 90 Date of receipt of test sample.........: May 12, 2020 Date of testing.............................: May 12, 2020- May 27, 2020 Date of issue...............................: May 27, 2020 Result ................. ........................: PASS Compiled by ( position+printed name+signature) . : File administrators Echo Wei Supervised by ( position+printed name+signature) . : Project Engineer Gaosheng Pan Approved by ( position+printed name+signature) . : RF Manager Hans Hu Testing Laboratory Name .............. : Shenzhen Huatongwei International Inspection Co., Ltd. Address ............................................ : 1/F, Bldg 3, Hongfa Hi-tech Industrial Park, Genyu Road, Tianliao, Gongming, Shenzhen, China 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. Report No.: CHTEW20050087 Page: 2 of 55 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V01 (2018-01) Contents 1 T E S T S T A N D A R D S A N D RE P O R T V E R S I O N 3 1.1. Test Standards 3 1.2. Report revised information 3 2 T E S T D E S C R I P T I O N 4 3 S U M M A R Y 5 3.1 Client Information 5 3.2 Product Description 5 3.3 Radio Specification Description 5 3.4 Testing Laboratory Information 7 4 T E S T C O N F I G U R A T I O N 8 4.1 Test frequency list 8 4.2 Operation mode 9 4.3 Support unit used in test configuration and system 10 4.4 Testing environmental condition 11 4.5 Statement of the measurement uncertainty 11 4.6 Equipments Used during the Test 12 5 T E S T C O N D I T I O N S A N D R E S U L T S 14 5.1 Conducted Carrier Output Power 14 5.2 99% Occupied Bandwidth & 26dB Bandwidth 15 5.3 Emission Mask 17 5.4 Modulation Limit 19 5.5 Audio Frequency Response 20 5.6 Frequency stability VS Temperature 22 5.7 Frequency stability VS Voltage 23 5.8 Transmitter Frequency Behavior 24 5.9 Transmit Conducted Spurious Emission 26 5.10 Transmitter Radiated Spurious Emission 27 5.11 AC Power Line Conducted Emission 39 5.12 Radiated Emission 42 6 T E S T S E T U P P H O T O S O F T H E E U T 45 7 E X T E R N A L A N D I N T E R N AL P H O T O S O F T H E E U T 48 8 A P P E N D I X R E P O R T 55 Report No.: CHTEW20050087 Page: 3 of 55 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V01 (2018-01) 1 TEST STANDARDS AND REPORT VERSION 1.1. Test Standards The tests were performed according to following standards: FCC Rules Part 2: Frequency allocations and radio treaty matters; General rules and regulations FCC Rules Part 90: Private land mobile radio services. ANSI C63.26-2015: American National Standard for Compliance Testing of Transmitters Used in Licensed Radio Services ANSI/TIA-603-E(2016): Land Mobile FM or PM Communications Equipment and Performance Standards FCC Part 15 Subpart B: Unintentional Radiators. ANSI C63.4-2014: American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz 1.2. Report revised information Revised No. Date of issued Description N/A 2020-05-21 Original Report No.: CHTEW20050087 Page: 4 of 55 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V01 (2018-01) 2 TEST DESCRIPTION Report clause Test Item Standard Requirement Result 5.1 Conducted Carrier Output Power Part 90.205 Part 2.1046(a) Pass 5.2 99% Occupied Bandwidth & 26dB bandwidth Part 90.209 & 210 Part 2.1049 Pass 5.3 Emission Mask Part 90.209 & 210 Part 2.1049 Pass 5.4 Modulation Limit Part 2.1047(b) Pass 5.5 Audio Frequency Response Part 2.1047(a) Pass 5.6 Frequency Stability VS Temperature Part 90.213 Part 2.1055 Pass 5.7 Frequency Stability VS Voltage Part 90.213 Part 2.1055 Pass 5.8 Transient Frequency Behavior Part 90.214 Pass 5.9 Transmit Conducted Spurious Emission Part 90.210 Part 2.1051 Pass 5.10 Transmit Radiated Spurious Emission Part 90.210 Part 2.1053 Pass 5.11 AC Power Line Conducted Emission Part 15.107 Pass 5.12 Radiated Emission Part 15.109 Pass Report No.: CHTEW20050087 Page: 5 of 55 Issued: 2020-05-21 Shenzhen Huatongwei International Inspection Co., Ltd. Report Template Version: V01 (2018-01) 3 SUMMARY 3.1 Client Information Applicant: Klein Electronics, Inc. Address: 349 N. Vinewood St, Escondido, California, USA 92029 Manufacturer: Klein Electronics, Inc. Address: 349 N. Vinewood St, Escondido, California, USA 92029 3.2 Product Description Main unit Name of EUT: Digital Transceiver Trade mark: Blackbox Model/Type reference: Go! Listed model(s): - Power supply: DC 7.5V Hardware version: DMR_UHF V1.2 Software version: GO V1.0.3.13 Ancillary unit Battery information: Model No.: Go!-BATT Norm: DC 7.5V 15Wh 2000mAh Charger…

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Appendix Report FCC PART 90 Test Form QRE315 V 3.1 (2019-11) Appendix clause Test Result (PASS/FAIL) APASS BPASS CPASS DPASS EPASS FPASS GPASS HPASS IPASS 5/18 Transmitter Frequency Behavior Spurious Emission On Antenna Port 5/19 5/20 5/19 5/19 5/18 5/18 5/27 5/19 Modulation Limit Aduio Frequency Response Occupied Bandwidth Frequency Stability Test & Temperature Frequency Stability Test & Voltage Project No. Start test date Emission Mask 59% Test Item Test date （M/D) Maximum Transmitter Power Temperature 23.6°C Humidity Test EngineerAuditor SHT2005015001EW Test sample No. YPHT20050150012 2020/5/14 Finish date 2020/5/27 Appendix Page:1 of 37 Project No.:SHT2005015001EW Appendix A:Maximum Transmitter Power Operation Mode Modulation Type Test Channel Measured Power(dBm) Measured Power(W) Rated Power(W) Percentage (%) Limit (%)Result TX-DNH4FSK CH L 36.14.124.002.9±20PASS TX-DNH4FSK CH M1 36.04.024.000.5±20PASS TX-DNH4FSK CH M2 36.34.254.006.1±20PASS TX-DNH4FSK CH M3 36.64.594.0014.8±20PASS TX-DNH4FSK CH H 36.34.264.006.5±20PASS TX-DNL4FSK CH L 29.60.911.00-8.8±20PASS TX-DNL4FSK CH M1 29.70.931.00-6.7±20PASS TX-DNL4FSK CH M2 29.60.911.00-8.8±20PASS TX-DNL4FSK CH M3 30.21.051.004.7±20PASS TX-DNL4FSK CH H 30.11.021.002.3±20PASS TX-ANHFM CH L 35.43.444.00-14.1±20PASS TX-ANHFM CH M1 36.14.114.002.8±20PASS TX-ANHFM CH M2 36.14.094.002.3±20PASS TX-ANHFM CH M3 36.14.124.002.9±20PASS TX-ANHFM CH H 36.24.154.003.7±20PASS TX-ANLFM CH L 29.30.851.00-14.9±20PASS TX-ANLFM CH M1 29.20.831.00-16.8±20PASS TX-ANLFM CH M2 29.30.851.00-14.9±20PASS TX-ANLFM CH M3 29.40.871.00-12.9±20PASS TX-ANLFM CH H 29.10.811.00-18.7±20PASS Appendix Page:2 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth 99%(kHz)26dB(kHz) TX-DNH4FSK CH L 7.8698.894 ≤11.25 PASS TX-DNH4FSK CH M1 7.7919.878 ≤11.25 PASS TX-DNH4FSK CH M2 7.7349.671 ≤11.25 PASS TX-DNH4FSK CH M3 7.6509.480 ≤11.25 PASS TX-DNH4FSK CH H 7.7039.660 ≤11.25 PASS TX-DNL4FSK CH L 7.8739.737 ≤11.25 PASS TX-DNL4FSK CH M1 7.7189.470 ≤11.25 PASS TX-DNL4FSK CH M2 7.7199.534 ≤11.25 PASS TX-DNL4FSK CH M3 7.7929.773 ≤11.25 PASS TX-DNL4FSK CH H 7.7059.679 ≤11.25 PASS TX-ANHFM CH L 5.24210.114 ≤11.25 PASS TX-ANHFM CH M1 5.23610.109 ≤11.25 PASS TX-ANHFM CH M2 5.23310.110 ≤11.25 PASS TX-ANHFM CH M3 5.24210.114 ≤11.25 PASS TX-ANHFM CH H 5.64510.118 ≤11.25 PASS TX-ANLFM CH L 5.64910.121 ≤11.25 PASS TX-ANLFM CH M1 5.23810.110 ≤11.25 PASS TX-ANLFM CH M2 5.23010.110 ≤11.25 PASS TX-ANLFM CH M3 5.24210.113 ≤11.25 PASS TX-ANLFM CH H 6.09710.120 ≤11.25 PASS Operation Mode Test Channel Occupied Bandwidth 99% Limit(kHz) Result Modulation Type Appendix Page:3 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TX-DNH4FSK CH L TX-DNH4FSK CH M1 TX-DNH4FSK CH M2 TEST PLOT RESULT Appendix Page:4 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-DNH4FSK CH M3 TX-DNH4FSK CH H TX-DNL4FSK CH L Appendix Page:5 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-DNL4FSK CH M1 TX-DNL4FSK CH M2 TX-DNL4FSK CH M3 Appendix Page:6 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-DNL4FSK CH H TX-ANHFM CH L TX-ANHFM CH M1 Appendix Page:7 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-ANHFM CH M2 TX-ANHFM CH M3 TX-ANHFM CH H Appendix Page:8 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-ANLFM CH L TX-ANLFM CH M1 TX-ANLFM CH M2 Appendix Page:9 of 37 Project No.:SHT2005015001EW Appendix B:Occupied Bandwidth Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-ANLFM CH M3 TX-ANLFM CH H Appendix Page:10 of 37 Project No.:SHT2005015001EW Appendix C:Emission Mask Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-DNH4FSK CH L TX-DNH4FSK CH L TX-DNH4FSK CH M1 Appendix Page:11 of 37 Project No.:SHT2005015001EW Appendix C:Emission Mask Operation Mode Modulation Type Test Channel TEST PLOT RESULT TX-DNH4FSK CH M1 TX-DNH4FSK CH M2 TX-DNH4FSK CH M2 Appendix Page:12 of 37 Project No.:SHT2005015001EW Appendix C:Emission Mask Operation Mode Modulation Type Test Channel TEST PLOT RESULT…

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