2AI28-RJSC300Two-Way Radio

RJSC300 Two-Way Radio Radio de dos vías portátil Radio bidirectionnelle portative ENGLISH The Klein Tools RJSC300 Two-Way Radio features 22 main channels with 121 Sub-channels. VOX voice activation with 3 sensitivity levels allows hands- free operation. The RJSC300 also features a built-in LED flashlight and a rotating removable belt clip. GENERAL SPECIFICATIONS • Channels: 22 Sub-channels: 121 (38 CTCSS codes/83 DCS code) • Range: Up to 3 miles (4.8 km) outdoors*, up to 35 floors indoors** • Operating/Storage Altitude: 6562' (2000m) • Charging Temperature: 32°F to 113°F (0°C to 45°C) • Operating Temperature: -4°F to 140°F (-20°C to 60°C) • Storage Temperature: -4°F to 86°F (-20°C to 30°C) • Relative Humidity: <85% non-condensing • Battery: Li-ion, 1500 mAh, non-replaceable • Charging Requirements: 5V DC • Dimensions:148(L) × 58(W) × 28(H)mm (not including Belt Clip) • Weight: 6.24oz. (177g) • Drop Protection: 6.5' (2m) • Ingress Protection (IP) Rating: IP65 • Certifications: FCC, IC, DOE/CEC, NRCAN, BQB FCC ID: 2AI28-RJSC300 IC: 21655-RJSC300 *Operating range may vary and is based on line-of-sight operation without obstruction, and under ideal conditions. **Operating range may vary depending on building structure and materials. Specifications subject to change. WARNINGS Read, understand, and follow these instructions to ensure safe operation. Failure to observe these warnings and instructions may result in risk of fire or electric shock. • DO NOT use the product if it is damaged or modified. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire,explosion, or injury. • Risk of fire and burns. DO NOT open, crush, heat above specified maximum temperature or incinerate. Prolonged exposure to direct sunlight can result in elevated temperatures. • DO NOT immerse in water or other liquids. • Properly seal the charging port cover to achieve specified water & foreign object ingress protection. Keep seal free of dirt, oil, sand, or other material that interferes with proper sealing. Failure to do so can result in risk of fire or electric shock. • DO NOT open the charging port cover if wet or in a wet environment. Thoroughly dry the unit and the seal around water-resistant cover completely before opening water resistant cover • DO NOT subject to impacts or drops greater than 6.5 ft. (2 m). Drops larger than this may not show signs of damage, but internal components may have been compromised. It is advisable to replace the unit if any such severe events occur. • Subjecting battery to extremely low air pressure may result in an explosion or the leakage of flammable liquid or gas. • DO NOT attempt to repair the product or charging cable. There are no user- serviceable parts. WARNING SYMBOLS Warning or CautionRisk of Electrical Shock Read Instructions FEATURE DETAILS - RADIO (FIG. A) 1Power/Volume Knob10Channel Down Button 2Antenna11Removeable Belt Clip 3Flashlight12Belt Clip Mount 4Display133/32" (2.5 mm) AUX Port / Cover 5Mode Button14Flashlight Button 6Microphone15Alert Button 7Speaker16USB-C Charging Port / Cover 8"PTT" (Push-To-Talk) Button17USB-C Cable 9Channel Up Button18Charging Terminals FEATURE DETAILS - LCD (FIG. B) A Transmit Icon J Low Frequency B Receive Icon K High Frequency C Green LED L "SCN" (Scan) Icon D Red LED M " VOX" (Voice-Operated Exchanged) Icon E Lock Icon F Battery Status Indicator N " CTS" (Continuous Tone-Coded Squelch [CTCSS]) Icon G Signal Strength Indicator H Channel O " DCS" (Digital Coded Squelch) Icon I Sub-channel CLEANING Wipe with a clean, dry lint-free cloth. Do not use abrasive cleaners or solvents. STORAGE Do not expose to high temperatures or humidity. After a period of storage in extreme conditions exceeding the limits mentioned in the General Specifications section, allow to return to normal operating conditions before using. COMPLIANCE FCC COMPLIANCE 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. NOTE: The grantee is not responsible for any changes or modifications not expressly approved by the party responsible for compliance. Such modifications could void the user’s authority to operate the equipment. 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. IC NOTICE TO CANADIAN USERS: This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s license-exempt RSS(s). Operation is subject to the following two conditions: (1) This device may not cause interference.(2) This device must accept any interference, including interference that may cause undesired operation of the device. This device complies with RSS-247 of Industry Canada. Operation is subject to the condition that this device does not cause harmful interference. CAN ICES-003…

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Klein Tools Inc. ADD: 450 Bond Street Lincolnshire, Illinois, United States, 60069 TEL: 847-821-3305 FAX: 847-478-0625 E-mail: [email protected] CFR 47 §2.911(d)(5)(i)(ii) Attestation Letter Attestation Letter Date: 2026-01-28 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i)(ii) Filing FCC ID: 2AI28-RJSC300 Klein Tools Inc. (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Klein Tools Inc. (“the applicant”) certifies that as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Klein Tools Inc. (“the applicant”) certifies that the equipment does not use Kaspersky's software information. Sincerely, Signature: Contact Person: Russell Goldmann II Title: Product Safety Engineering Director

U.S. AGENT LETTER OF ATTESTATION Date: 2026-01-28 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: 2AI28-RJSC300 Klein Tools Inc. (“the Applicant”) certifies that, as of the date of the filing of the application, Klein Tools Inc. (U.S. agent). is our designated U.S. agent for service of process for the above referenced FCC ID. Klein Tools Inc. (“the Applicant”) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Klein Tools Inc. (U.S. agent) accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent and Applicant Information: Name: Klein Tools Inc. Address: 450 Bond Street Lincolnshire, Illinois, United States, 60069 FRN: 0025719949 Tel.: 847-821-3305 Email: [email protected] Signed by (printed name): Russell Goldmann II Signature:

QA-FR-170-B Klein Tools Inc. ADD: 450 Bond Street Lincolnshire, Illinois, United States, 60069 TEL: 847-821-3305 FAX: 847-478-0625 E-mail: [email protected] FCC Authorization Date: 2026-01-28 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We Klein Tools Inc. hereby authorizes Bay Area Compliance Laboratories Corp. (Xiamen) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. (Xiamen) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Client’s signature: Printed Name: Russell Goldmann II Title: Product Safety Engineering Director

QA-FR-172-A Klein Tools Inc. ADD: 450 Bond Street Lincolnshire, Illinois, United States, 60069 TEL: 847-821-3305 FAX: 847-478-0625 E-mail: [email protected] FCC Confidential Authorization Date: 2026-01-28 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AI28-RJSC300 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Klein Tools Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below: • Block Diagram • Schematics • Operation Description • BOM • Tune Up Procedure The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature: Printed Name: Russell Goldmann II Title: Product Safety Engineering Director

Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 1 / 7 EUT EXTERNAL PHOTOGRAPHS Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 2 / 7 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 3 / 7 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 4 / 7 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 5 / 7 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 6 / 7 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-EXP Page 7 / 7

Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 1 / 8 EUT INTERNAL PHOTOGRAPHS Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 2 / 8 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 3 / 8 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 4 / 8 Antenna Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 5 / 8 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 6 / 8 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 7 / 8 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-INP Page 8 / 8

Note: The information marked # is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. This report must not be used by the customer to claim product certification, approval, or endorsement by NVLAP or any agency of the U.S. Government. This report may contain data that are not covered by the NVLAP accreditation and are marked with an asterisk “▼”. Bay Area Compliance Laboratories Corp. (Shenzhen) 5F(B-West) , 6F, 7F, the 3rd Phase of Wan Li Industrial Building D, Shihua Rd, FuTian Free Trade Zone, Shenzhen, China Tel: +86-755-33320018Fax: +86-755-33320008www.baclcorp.com.cn TR-EM-SA005 Page 1 of 50 Version 3.0 TEST REPORT ApplicantName:KleinToolsInc. Address:450BondStreetLincolnshire,Illinois,UnitedStates,60069 ReportNumber:2501V04526E-SAA FCCID:2AI28-RJSC300 Test Standard (s) FCC47CFRpart2.1093 Sample Description ProductName:Two-WayRadio ModelNo.:RJSC300 MultipleModel(s)No.:N/A TradeMark:KleinTools SerialNumber:37F6-1 DateReceived:2025/07/25 DateofTest:2025/08/21 IssueDate:2025/11/25 TestResult: Pass ▲  ▲Intheconfigurationtested,theEUTcompliedwiththestandardsabove.  Prepared and Checked By: Approved By: Bob Lu Luke Jiang SAR EngineerSAR Engineer Bay Area Compliance Laboratories Corp.(Shenzhen) Report No.: 2501V04526E-SAA TR-EM-SA005 Page 2 of 50 Version 3.0 Attestation of Test Results Frequency Band Max. SAR Level(s) Reported(W/kg) Limit(W/Kg) PTT (462.5500-467.7125MHz) 1g Head SAR 0.36 1.6 1g Body SAR 0.65 Applicable Standards FCC 47 CFR part 2.1093 Radiation exposure evaluation: portable devices RF Exposure Procedures: TCB Workshop April 2019 IEEE 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 KDB procedures KDB 447498 D01 General RF Exposure Guidance v06 KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01r04 KDB 865664 D02 RF Exposure Reporting v01r02 KDB 643646 D01 SAR Test for PTT Radios v01r03 Note: This wireless device has been shown to be capable of compliance for localized specific absorption rate (SAR) for General Population/Uncontrolled Exposure limits specified in FCC 47 CFR part 2.1093 and has been tested in accordance with the measurement procedures specified in IEEE 1528-2013 and RF exposure KDB procedures. The results and statements contained in this report pertain only to the device(s) evaluated. Bay Area Compliance Laboratories Corp.(Shenzhen) Report No.: 2501V04526E-SAA TR-EM-SA005 Page 3 of 50 Version 3.0 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ......................................................................................................................... 4 EUT DESCRIPTION ................................................................................................................................................... 5 TECHNICAL SPECIFICATION ......................................................................................................................................... 5 REFERENCE, STANDARDS, AND GUILDELINES .............................................................................................. 6 SAR LIMITS ................................................................................................................................................................ 6 FACILITIES ................................................................................................................................................................. 7 DESCRIPTION OF TEST SYSTEM .......................................................................................................................... 8 EQUIPMENT LIST AND CALIBRATION ............................................................................................................. 15 EQUIPMENT’S LIST & CALIBRATION INFORMATION .................................................................................................. 15 SAR MEASUREMENT SYSTEM VERIFICATION ............................................................................................. 16 LIQUID VERIFICATION ............................................................................................................................................... 16 SYSTEM ACCURACY VERIFICATION .......................................................................................................................... 17 SAR SYSTEM VALIDATION DATA .................................................................................................................... 18 EUT TEST STRATEGY AND METHODOLOGY ................................................................................................. 19 TEST POSITIONS FOR FRONT-OF-FACE CONFIGURATIONS ........................................................................................... 19 TEST POSITIONS FOR BODY-WORN AND OTHER CONFIGURATIONS ............................................................................. 20 TEST DISTANCE FOR SAR EVALUATION ................................................................................................................... 20 SAR EVALUATION PROCEDURE ................................................................................................................................ 21 CONDUCTED OUTPUT POWER MEASUREMENT .......................................................................................... 22 TEST PROCEDURE ...............…

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Model：0459 Type：Spring Material: Brass Size：46mm Frequency range: TX/RX:462.5500-467.7125MHz Manufacturer： Fujian Senhaix Electronic Technology Co., Ltd Address： No.7 Zihua Road, Jiangnan Hi-tech Industrial Zone, Licheng, Quanzhou, Fujian, China Antenna Picture Max Gain： 1dBi 462.7250MHz

FCC Part 95 Page 1 of 38 FCC PART 95 TEST REPORT For Klein Tools Inc. 450 Bond Street, Lincolnshire, Illinois, United States, 60069 Report Type: Original Report Product Name: Two-Way Radio Report Number: 2507V04526E-RF-01 Re port Date: 2025-08-08 Reviewed By: Ash Lin Approved By: Miles Chen Prepared By : Bay Area Compliance Laboratories Corp. (Xiamen) Unit 102, No. 902 Meifeng South Road, Binhai West Avenue, Science and Technology Innovation Park, Torch High tech Zone XiaMen Tel: +86-592-3200111 www.baclcorp.com.cn FCC ID: 2AI28-RJSC300 Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-01 FCC Part 95 Page 2 of 38 TABLE OF CONTENTS REPORT REVISION HISTORY ................................................................................................................................ 4 GENERAL INFORMATION ....................................................................................................................................... 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 5 ★ANTENNA INFORMATION ......................................................................................................................................... 5 OBJECTIVE ................................................................................................................................................................... 5 TEST METHODOLOGY .................................................................................................................................................. 6 MEASUREMENT UNCERTAINTY .................................................................................................................................... 6 TEST FACILITY ............................................................................................................................................................. 6 SYSTEM TEST CONFIGURATION .......................................................................................................................... 7 TEST MODE AND VOLTAGE .......................................................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 8 SUMMARY OF TEST RESULTS ............................................................................................................................... 9 TEST EQUIPMENT LIST ......................................................................................................................................... 10 FCC §2.1046, §95.567 – FRS TRANSMIT POWER ................................................................................................ 11 APPLICABLE STANDARD ............................................................................................................................................ 11 EUT SETUP BLOCK DIAGRAM ................................................................................................................................... 11 TEST PROCEDURE ...................................................................................................................................................... 11 TEST DATA ................................................................................................................................................................ 12 FCC §2.1047, §95.575 – FRS MODULATION LIMITS .......................................................................................... 14 APPLICABLE STANDARD ............................................................................................................................................ 14 TEST SETUP BLOCK DIAGRAM ................................................................................................................................... 14 TEST PROCEDURE ...................................................................................................................................................... 14 TEST DATA ................................................................................................................................................................ 15 FCC §2.1049, §95.573, §95.579 - AUTHOURIZED BANDWIDTH AND EMISSION MASK ............................ 22 APPLICABLE STANDARD ............................................................................................................................................ 22 EUT SETUP BLOCK DIAGRAM ................................................................................................................................... 22 TEST PROCEDURE ...................................................................................................................................................... 23 TEST DATA ................................................................................................................................................................ 24 FCC §2.1053 & §95.579 - RADIATED SPURIOUS EMISSION ............................................................................ 27 APPLICABLE STANDARD ......................................................................................…

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Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-TSP-01 Page 1 / 2 EUT SETUP PHOTOS RSE - Front View (Below 1 GHz) RSE - Back View (Below 1 GHz) Bay Area Compliance Laboratories Corp. (Xiamen) Report No.: 2507V04526E-RF-TSP-01 Page 2 / 2 RSE - Front View (Above 1 GHz) RSE - Back View (Above 1 GHz)