2BSQE-GMC-600GQ GMC Radiation Detector Geiger Counter

GQ GMC-600 Pro Geiger Counter User Guide GQ Electronics LLC 1001 SW Klickitat Way, Suite 110, Seattle WA 98134, USA eMail: [email protected] Revision 1.00 June-2025 2 (EN) WARNING: Do not attempt to open or disassemble the device without professional knowledge. Incorrect handling may result in damage to the device, voiding of the warranty, or personal injury. (DE) WARNUNG: Versuchen Sie nicht, das Gerät ohne Fachkenntnisse zu öffnen oder zu zerlegen. Eine falsche Handhabung kann zu Schäden am Gerät, zum Erlöschen der Garantie oder zu Verletzungen führen. (FR) AVERTISSEMENT : N'essayez pas d'ouvrir ou de démonter l'appareil sans connaissances professionnelles. Une manipulation incorrecte peut endommager l'appareil, annuler la garantie ou entraîner des blessures corporelles. (IT) ATTENZIONE: non tentare di aprire o smontare il dispositivo senza una conoscenza professionale. Una gestione non corretta può causare danni al dispositivo, invalidare la garanzia o causare lesioni personali. (ES) ADVERTENCIA: No intente abrir ni desmontar el dispositivo sin conocimientos profesionales. Una manipulación incorrecta puede provocar daños en el dispositivo, la anulación de la garantía o lesiones personales. (PL) OSTRZEŻENIE: Nie próbuj otwierać ani demontować urządzenia bez fachowej wiedzy. Nieprawidłowe obchodzenie się z urządzeniem może spowodować jego uszkodzenie, unieważnienie gwarancji lub obrażenia ciała. (CZ) VAROVÁNÍ: Nepokoušejte se zařízení otevřít nebo rozebrat bez odborných znalostí. Nesprávná manipulace může vést k poškození zařízení, ztrátě záruky nebo zranění osob. (TK) UYARI: Profesyonel bilginiz olmadan cihazı açmaya veya sökmeye çalışmayın. Yanlış kullanım, cihaza zarar verebilir, garantiyi geçersiz kılabilir veya kişisel yaralanmaya neden olabilir. (JP)警告: 専門知識がない場合は、デバイスを開いたり分解したりしないでください。誤った取り 扱いをすると、デバイスが損傷したり、保証が無効になったり、人身事故につながる可能性があり ます。 3 Document Revision History: Re.1.00, Jun-2025 Initial version. 4 Table of Contents Document Revision History: ................................................................................................................................................ 3 Table of Contents .................................................................................................................................................................. 4 Overview .............................................................................................................................................................................. 6 Specifications: .................................................................................................................................................................. 6 Packing List: .................................................................................................................................................................... 7 How it works? ....................................................................................................................................................................... 7 Caution.................................................................................................................................................................................. 7 Background Safe Levels ....................................................................................................................................................... 7 Hardware setup ................................................................................................................................................................ 8 Software set up ................................................................................................................................................................. 8 Verify USB Comport in Windows ........................................................................................................................................ 9 GQ GMC Geiger Counter Multi-Function Keys ................................................................................................................ 10 Key1 ............................................................................................................................................................................... 10 Key2 ............................................................................................................................................................................... 10 Key3 ............................................................................................................................................................................... 10 Key4 ............................................................................................................................................................................... 10 Power saving mode ............................................................................................................................................................. 10 Popup Windows .................................................................................................................................................................. 11 Graphic User Interface (GUI) ............................................................................................................................................. 11 Graphic Icons: ................................................................................................................................................................ 11 Display Modes .................................................................................................................................................................... 12 Dose Rate Mode: ............................................................................................................................................................ 12 Graphic Mode: ..................................................................…

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Rev 1/26/2023 GQ Electronics LLC Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 11-25-2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BSQE-GMC-600 [GQ Electronics LLC] 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. [GQ Electronics LLC] certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) Limin Zhang Rev 1/26/2023 GQ Electronics LLC Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 11-25-2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BSQE-GMC-600 [GQ Electronics LLC] ce8rtifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Limin Zhang

GQ Electronics LLC U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: November 25, 2025 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BSQE-GMC-600 GQ Electronics LLC (“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: GQ Electronics LLC FRN: 0037611639 Address: 1001 SW Klickitat Way, Suite 110, Seattle WA 98134 Signature: Contact Person: Limin Zhang Tel: 206-829-8093 Email: [email protected]

GQ Electronics LLC Date: November 25, 2025 Product Model Number: GMC-600 PRO FCC ID: 2BSQE-GMC-600 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. Signature： By: Limin Zhang Title: Sales Manager Tel.: 206-829-8093 Email: [email protected] On behalf of: GQ Electronics LLC

GQ Electronics LLC Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: November 25, 2025 Subject; Request for Confidentiality FCC ID: 2BSQE-GMC-600 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 Software Security Requirements for UNII devices 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： By: Limin Zhang Title: Sales Manager

GQ Electronics LLC (1001 SW Klickitat Way, Suite 110, Seattle WA 98134) Model Difference Statement DATE: November 25, 2025 Product Model Number: GMC-600 PRO FCC ID: 2BSQE-GMC-600 Dear Sir/Madam, Added models GMC-600 PRO+, GQ-900, GQ-900+, GQ-900 PRO basis of the original product GMC-600 PRO The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. Sincerely, Name: Limin Zhang Title: Manager Company name: GQ Electronics LLC Address: 1001 SW Klickitat Way, Suite 110, Seattle WA 98134

Page 1 of 3 1. General Inf ormation 1.1 Antenna Information Manufacturer: GQ Electronics LLC Address of Manufacturer: 1001 SW Klickitat Way, Suite 110, Seattle WA 98134 Product Name: 2.4GHz Antenna Model Name: GMC-600 PRO Frequency Range: 2412MHz - 2462MHz Type of Antenna: PCB Antenna Antenna Gain: 0dBi (Max.) Impedance: 50 ohm Antenna View: Length * Width (18mm * 7.2mm) Page 2 of 3 2. Antenna Specification inf ormation 2.1 Gain Frequency Peak Gain (dBi) Polarity 2412MHz 0 Horizontal 2412MHz -0.3 Vertical 2437MHz -0.6 Horizontal 2437MHz -0.2 Vertical 2462MHz -0.9 Horizontal 2462MHz -0.3 Vertical Page 3 of 3 2.2 Radiation Pattern View

Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report Annex A. EUT External Photos EUT View 1 Model: GMC-600 PRO EUT View 2 Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report EUT View 3 EUT View 4 Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report EUT View 5 EUT View 6 Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report EUT View 7

Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report Annex D. Label and Inf ormation FCC Label Sample Label Size: 3cm*1.5cm FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report Annex B. EUT Internal Photos EUT Internal View 1 EUT Internal View 2 Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report EUT Internal View 3 EUT Internal View 4 PCB ANT

FCC ID: 2BSQE-GMC-600 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 Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. For BR+EDR Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit 6.94 6(±1) 7 5.01 2412 5 1.55617 3.0 So a SAR test is not required

Report No: DSP25100482-1E FCC Test Report Page 1 of 48 FCC TEST REPORT FCC ID: 2BSQE-GMC-600 Report No. : DSP25100482-1E Applicant : GQ Electronics LLC Product Name : GQ GMC Radiation Detector Geiger Counter Model Name : GMC-600 PRO Test Standard : FCC Part 15.247 Date of Issue : 2025-11-26 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. Report No: DSP25100482-1E FCC Test Report Page 2 of 48 Test Report Basic Information Applicant..................................: GQ Electronics LLC Address of Applicant...............: 1001 SW Klickitat Way, Suite 110, Seattle WA 98134 Manufacturer..........................: GQ Electronics LLC Address of Manufacturer........: 1001 SW Klickitat Way, Suite 110, Seattle WA 98134 Product Name.........................: GQ GMC Radiation Detector Geiger Counter Brand Name.............................: GQ Main Model..............................: GMC-600 PRO Series Models..........................: GMC-600 PRO+, GQ-900, GQ-900+, GQ-900 PRO Test Standard..........................: FCC Part 15 Subpart C KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.4-2014 ANSI C63.ͳͲ-2020 Date of Test .............................: 2025-10-24 to 2025-10-29 Test Result...............................: PASS Tested By ................................: (Tate Chen) Reviewed By............................: (Lorzix Luo) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. Report No: DSP25100482-1E FCC Test Report Page 3 of 48 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 16 5.1 Standard and Limit.............................................................................................................................................. 16 5.2 Test Procedure.................................................................................................................................................... 16 5.3 Test Data and Results .......................................................................................................................................... 18 6. Band-edge Emissions(Radiated) ............................................................................................................................... 22 6.1 Standard and Limit.............................................................................................................................................. 22 6.2 Test Procedure.................................................................................................................................................... 22 6.3 Test Data and Results .......................................................................................................................................... 22 7. Maximum Conducted Output Power .............…

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Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report Annex C. Test Photos Conducted Emission Test View Radiated Emission Test View Below 1GHz Report No: DSP25100482-1E FCC ID: 2BSQE-GMC-600 Annex of Test Report Radiated Emission Test View Above 1GHz