2AE3N-ATH650-ATH635Alpen Apex LRF

Guangzhou Bresser Optical Instruments Co., LTD. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [January 5, 2026] U.S. Agent Designation [Guangzhou Bresser Optical Instruments Co., LTD.] acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought FCC ID: 2AE3N-ATH650-ATH635 Name and company of U.S. agent: [Explore Scientific, LLC] Physical U.S. address of agent: [1010 South 48th Street Springdale Arkansas 72762 United States] FRN of U.S. agent: [0027692292] Email address of U.S. agent: [[email protected]] Telephone of U.S.agent: 8662523811 [Explore Scientific, LLC] acknowledges their obligation to accept service of process on behalf of [Guangzhou Bresser Optical Instruments Co., LTD.]. [Guangzhou Bresser Optical Instruments Co., LTD.] with the FRN [0024674764] accepts its obligation to maintain an agent for service of process in the United States for no less than 1 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. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. Sincerely, Signature Signature [Agnes Huang] [Robert Price] [Manager] [COO] [Guangzhou Bresser Optical Instruments Co., LTD.] [Explore Scientific, LLC]

Guangzhou Bresser Optical Instruments Co., LTD. (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2AE3N-ATH650-ATH635 [Guangzhou Bresser Optical Instruments Co., LTD.] (“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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name)Agnes Huang Guangzhou Bresser Optical Instruments Co., LTD. (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2AE3N-ATH650-ATH635 [Guangzhou Bresser Optical Instruments Co., LTD.] (“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. Sincerely, (Applicant signature) (Applicant printed name)Agnes Huang

Guangzhou Bresser Optical Instruments Co., LTD. Model Difference Data:January 5, 2026 Product description: Alpen Apex LRF Model name: ATH650, ATH635 Trade Name: Alpen FCC ID: 2AE3N-ATH650-ATH635 All the model are the same circuit and RF module, only the model names are different. Regards Sincerely Client’s signature : Client’s name / title : Agnes Huang (Manager) Contact information / address: No.12 Kangda RD., DongCheng Zone, Yunpu Industrial District, Huangpu, Guangzhou, China.

Guangzhou Bresser Optical Instruments Co., LTD. (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Alpen Apex LRF / ATH650, ATH635 / FCC ID: 2AE3N-ATH650-ATH635) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☒ Internal Photos ☐ NOTE 1 ☒ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No required to be submitted with this application be permanently withheld from public review. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Signature: Name: Agnes Huang Title: Manager

Guangzhou Bresser Optical Instruments Co., LTD. (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen CTB Testing Technology Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: Name: Agnes Huang Title: Manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: ATH650 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 4 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 4

FCC ID LABEL: Label Location: FCC ID: 2AE3N-ATH650-ATH635 Model No.: ATH650

Shenzhen CTB Testing Co., Ltd. FCC ID: 2AE3N-ATH650-ATH635 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. 2.4GWIFI: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.412 8.687 7.398±19.007.94<52.467283.00YES 2.437 8.696 7.418±19.007.94<52.480033.00YES 2.462 8.105 6.468±19.007.94<52.492723.00YES 2.412 8.993 7.938±19.007.94<52.467283.00YES 2.437 7.397 5.497±18.006.31<51.969963.00YES 2.462 8.764 7.528±19.007.94<52.492723.00YES 2.412 7.624 5.797±18.006.31<51.959833.00YES 2.437 7.937 6.227±18.006.31<51.969963.00YES 2.462 7.227 5.287±18.006.31<51.980043.00YES 802.11b 802.11g 802.11n( HT20) Conclusion: For the max result : 2.49272≤ FCC Limit 3.0 for 1g SAR.

Antenna Report 2025/3/5 Contents 1 Specification .............................................................................................................................. 3 2 Antenna Dimension ................................................................................................................... 4 3 Picture ....................................................................................................................................... 5 4 Electrical Test ............................................................................................................................. 6 Method .......................................................................................................................... 6 Device ............................................................................................................................ 6 Passive Test .................................................................................................................... 6 1 Specification Specification P/N Frequency 2400~2500MHz Antenna Type chip antenna Dimension 5mm*2mm Impedance 50Ω Polarization Linear VSWR <3 Axial Ratio Not involved Efficiency 17.85%~23.15%@2.4~2.5GHz Gain -0.216dBi Radiation Pattern Omnidirectional Connection Not involved Power Handling 1W 2 Antenna Dimension T=0.5mm L=5mm W=2mm L W 3 Picture 4 Electrical Test Method Name Parameter Method Standard no. Mobile Communication antenna VSWR Generic specification for antennas used in the mobile communications GB/T 9410-2008 Antenna gain Radiation pattern Antenna performance Radiation efficiency IEEE Standard Test Procedures for Antennas ANSI/IEEE Std 149- 1979 Device Equipment Manufacturer Model No. Serial No. Last Cal. Due Date Network Analyzer Rohde & Schwarz ZNB 8 1311.6010K44- 103942-aM 2024.05.10 2025.05.09 Passive Test 4.3.1 Position 4.3.2 Return Loss & VSWR Frequency(MHz) 2400 2450 2500 Return Loss(dB) -7.2 -9.0 -10.5 4.3.3 Efficiency & Gain Frequency(MHz) Efficiency(dB) Efficiency(%) Gain(dBi) 2400 -8.319 19.73% -1.433 2410 -8.43 18.36% -1.374 2420 -8 17.85% -1.833 2430 -7.324 20.52% -0.939 2440 -6.869 20.56% -0.216 2450 -7.186 19.12% -0.342 2460 -7.327 18.51% -0.415 2470 -6.807 20.86% 0.185 2480 -6.355 23.15% 0.727 2490 -6.901 20.41% 0.323 2500 -7.127 19.38% 0.077 4.3.4 2D Report 2450MHz 90 Total(H-XY) 2450MHz 0 Total(E1-XZ), 2450MHz 90 Total(E2-YZ) 4.3.5 3D Report 2450MHz 3D Front 2450MHz 3D Back

TEST REPORT Compiled by: Reviewed by: Approved by: Kai Chen Martin Feng Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Test item description: Alpen Apex LRF FCC ID: 2AE3N-ATH650-ATH635 Trademark(s): Alpen Model/Type reference: ATH650, ATH635 Applicant’s name: Guangzhou Bresser Optical Instruments Co., LTD. Address: No.12 Kangda RD., DongCheng Zone, Yunpu Industrial District, Huangpu, Guangzhou, China. Manufacturer: Guangzhou Jinghua Precision Optics Co., Ltd Address: No.12 Kangda RD., Dong Cheng Zone, Yunpu Industrial District, Huangpu, Guangzhou, China. Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Sep. 09, 2025 Sample tested Date: Sep. 09, 2025 to Oct. 29, 2025 Issue Date: Oct. 29, 2025 Report No.: CTB25090900503RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is WIFI-2.4GHz band radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25090900503RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 52 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................................................................................... 3 2. TEST SUMMARY ............................................................................................................................. 4 3. MEASUREMENT UNCERTAINTY ................................................................................................... 5 4. PRODUCT INFORMATION AND TEST SETUP ............................................................................. 6 4.1 Product Information ............................................................................................................................ 6 4.2 Test Setup Configuration ................................................................................................................... 6 4.3 Support Equipment ............................................................................................................................ 6 4.4 Channel List ....................................................................................................................................... 6 4.5 Test Mode .......................................................................................................................................... 7 4.6 Test Environment ............................................................................................................................... 7 5. TEST FACILITY AND TEST INSTRUMENT USED ......................................................................... 8 5.1 Test Facility ........................................................................................................................................ 8 5.2 Test Instrument Used ......................................................................................................................... 8 6. AC POWER LINE CONDUCTED EMISSION .................................................................................. 11 6.1 Block Diagram Of Test Setup ........................................................................................................... 11 6.2 Limit .................................................................................................................................................. 11 6.3 Test procedure ................................................................................................................................. 11 6.4 Test Result ....................................................................................................................................... 13 7. RADIATED SPURIOUS EMISSION ............................................................................................... 15 7.1 Block Diagram Of Test Setup ........................................................................................................... 15 7.2 Limit .................................................................................................................................................. 15 7.3 Test procedure ................................................................................................................................. 16 7.4 Test Result ....................................................................................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ................................................ 34 8.1 Block Diagram Of Test Setup ........................................................................................................... 34 8.2 Limit .................................................................................................................................................. 34 8.3 Test procedure ................................................................................................................................. 34 8.4 Test Result ....................................................................................................................................... 35 9. COUDUCTED OUTPUT POWER ...................................................................................…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 2 Model: ATH650 Radiated Emission Below 1G Above 1G Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 2 Conducted emissions