2A6V6-K18Anti-lost device

Dongguan Yuyang Innovation Technology Co., Ltd. (December 1, 2025) 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: 2A6V6-K18 [Dongguan Yuyang Innovation Technology 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)Xuanming Liu Dongguan Yuyang Innovation Technology Co., Ltd. (December 1, 2025) 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: 2A6V6-K18 [Dongguan Yuyang Innovation Technology 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)Xuanming Liu

Dongguan Yuyang Innovation Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [December 1, 2025] U.S. Agent Designation [Dongguan Yuyang Innovation Technology 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: 2A6V6-K18 Name and company of U.S. agent: [GLOCERTS TECHNOLOGY INC] Physical U.S. address of agent: [19784 SUNKISSED RIDGE DR, RIVERSIDE, CA 92507] FRN of U.S. agent: [0036339737] Email address of U.S. agent: [[email protected]] Telephone of U.S.agent: (626) 588-8039 [GLOCERTS TECHNOLOGY INC] acknowledges their obligation to accept service of process on behalf of [Dongguan Yuyang Innovation Technology Co., Ltd.]. [Dongguan Yuyang Innovation Technology Co., Ltd.] with the FRN [0032412918] 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 [Xuanming Liu] [Huiying Fan] [General Manager] [Director] [Dongguan Yuyang Innovation Technology Co., Ltd.] [GLOCERTS TECHNOLOGY INC]

Dongguan Yuyang Innovation Technology Co., Ltd. (December 1, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Anti-lost device / K18 / FCC ID: 2A6V6- K18 ) 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: Xuanming Liu Title: General Manager

Dongguan Yuyang Innovation Technology Co., Ltd. (December 1, 2025) 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: Xuanming Liu Title: General Manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 3 Model: K18 External Photos Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 3 Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 3

FCC ID LABEL: Label Location: FCC ID: 2A6V6-K18 Model No.: K18

Shenzhen CTB Testing Co., Ltd. FCC ID: 2A6V6-K18 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. BLE1M: 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 2.402 -1.512 0.71-1±10.001.00<50.309973.00YES 2.441 -1.596 0.69-1±10.001.00<50.312473.00YES 2.480 -2.381 0.58-2±1-1.000.79<50.250183.00YES GFSK BLE2M: 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 2.402 -1.527 0.70-1±10.001.00<50.309973.00YES 2.441 -1.635 0.69-1±10.001.00<50.312473.00YES 2.480 -2.383 0.58-2±1-1.000.79<50.250183.00YES GFSK Conclusion: For the max result : 0.31247≤ FCC Limit 3.0 for 1g SAR.

Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China GENERAL INFORMATION 1.1 Test Environment Condition Ambient Temperature 19 to 25 °C Ambient Relative 45 to 55 % Humidity Ambient Pressure N/A (Not applicable) 1.2 Announce (1) The test report is invalid if not marked with the signatures of the persons responsible for preparing and approving the test report. (2) The test report is invalid if there is any evidence and/or falsification. (3) The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. (4) This document may not be altered or revised in any way unless done so and all revisions are duly noted in the revisions section. (5) Content of the test report, in part or in full, cannot be used for publicity and/or promotional purposes without prior written approval from the laboratory. Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China PRODUCT INFORMATION 2.1 Applicant Applicant Lenze Technology Co.,LTD Address d.c., 26c newspaper west tower, 6008 shennanAvenue, Futian District , Contact Person Tony Telephone Number +86 0755-82031775;25332530 Fax Number +86 0755-82713604 E-mail Address [email protected] 2.2 Manufacturer Manufacturer Lenze Technology Co.,LTD Address d.c., 26c newspaper west tower, 6008 shennanAvenue, Futian District , Shenzhen City, Guangdong Province, China Contact Person N/A Telephone Number N/A Fax Number N/A E-mail Address N/A 2.3 General Description for Equipment under Test (EUT) EUT Type Bluetooth Antenna Model Name PCB Antenna Antenna Type PCB Antenna Hardware Version N/A Serial Number N/A Dimensions N/A 2.4 Technical Information Frequency Range 2400MHz~ 2500MHz Test Frequencies 2402MHz, 2441MHz, 2480MHz Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China SUMMARY OF TEST RESULTS 3.1 Test Standards No. Identity Document Title 1 IEEE149-1979 IEEE Standard Test Procedures for Antennas 3.2 Test Verdict Report Section Description Remark ANNEX A.1 Gain And Efficiency -- ANNEX B Radiation Pattern -- 3.3 Test Uncertainty The uncertainty is calculated using the methods suggested in the "Guide to the Expression of Uncertainty in Measurement" (GUM) published by ISO. Item Uncertainty VSWR(S11) 0.4dB Gain -0.2dB Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China GENERAL TEST CONFIGURATIONS 4.1 Test Condition Environment Parameter Selected Values During Tests Temperature Voltage Relative Humidity Normal Temperature, Normal Voltage 25°C N/A 51% (NTNV) 4.2 Test Equipment List Description Manufacturer Model Serial No. Cal. Date Cal. Due Vector Network Agilent E5071C MY46103472 2014.09.07 2015.09.06 Analyzer 5*5*5 Full Anechoic SATIMO 5*5*5 N/A 2014.09.05 2015.09.04 Chamber SG24 Multi-probe Antenna Measurement SATIMO SG24-L 1101855-0001 2014.10.25 2015.10.24 System 4.3 Test Setup Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China ANNEX A TEST RESULTS A.1 Gain and Efficiency Frequency Gain (dBi) Efficiency (%) 2402MHz -0.08 1.88 2441MHz -0.21 1.96 2480MHz -0.18 2.2 ANNEX B RADIATION PATTERN 3DPattern 2402MHZ Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China 2480MHZ 1D Radiation Pattern PHI =0 Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China PHI =90 THETA = 90 Lenze Technology Co.,LTD Tel:+86 0755-82031775;25332530 Fax:+86 0755-82713604 26c newspaper west tower, 6008 shennanAvenue,FutianDistrict, Shenzhen City, GuangdongProvince,China ANNEX C TEST SETUP PHOTO ANNEX D EUT PHOTO Antenna shape

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 41 TEST REPORT Compiled by: Reviewed by: Approved by: Zhou Kui Arron Liu 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. Product Name: Anti-lost device FCC ID: 2A6V6-K18 Trademark: N/A Model Number: K18 Prepared For: Dongguan Yuyang Innovation Technology Co., Ltd. Address: Room 201, Building 3, No. 15 Dunlong Road, Tangxia Town, Dongguan City, Guangdong Province Manufacturer: Dongguan Yuyang Innovation Technology Co., Ltd. Address: Room 201, Building 3, No. 15 Dunlong Road, Tangxia Town, Dongguan City, Guangdong Province 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. 02, 2025 Sample tested Date: Sep. 02, 2025 to Sep. 22, 2025 Issue Date: Sep. 22, 2025 Report No.: CTB25090209209RF01 Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2020 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB25090209209RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 41 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 ..................................................................................................................................... 7 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 ............................................... 24 8.1 Block Diagram Of Test Setup ......................................................................................................... 24 8.2 Limit ................................................................................................................................................ 24 8.3 Test procedure ............................................................................................................................... 24 8.4 Test Result ..................................................................................................................................... 25 9. COUDUCTED OUTPUT POWER ................................................................................................. 29 9.1 Block Diag…

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Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 1 Model: K18 Radiated Emission Below 1G Above 1G