2BO44-Y15smart watch

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Shenzhen Shanyun Audio Technology Co., Ltd. Covered Equipment Certification Attestation Letter 11/1/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BO44-Y15 Shenzhen Shanyun Audio 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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Shenzhen Shanyun Audio 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Shenzhen Shanyun Audio Technology Co., Ltd. (“the applicant”) 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). <Signature>: Name: Jason lu Title: Manager Company: Shenzhen Shanyun Audio Technology Co., Ltd. Date: 11/1/2025

Shenzhen Shanyun Audio Technology Co., Ltd. * the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 11/1/2025 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2BO44-Y15 FRN of applicant: 0037004876 Per section 2.911(d)(7) of the FCC rules, [Shenzhen Shanyun Audio Technology Co., Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Herland International Trading Inc FCC Registration Number (FRN): 0036324101 Physical U.S. Company Address: 1370 Valley Vista Dr Ste 200 Diamond Bar, CA 91765 Contact Person: Jianfeng Gao Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. 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. Applicant Signed: Signed: Printed name: Jason lu Title: Manager Company Name: Shenzhen Shanyun Audio Technology Co., Ltd. Date: 11/1/2025 Agent Signed (if different from Applicant): Signed: Printed name: Jianfeng Gao Title: Manager Company Name: Herland International Trading Inc Date: 11/1/2025

Shenzhen Shanyun Audio Technology Co., Ltd. 2025-11-01 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BO44-Y15 Product Name: smart watch Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission’s 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 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. <Signature>: Name: Jason lu Title: Manager Company: Shenzhen Shanyun Audio Technology Co., Ltd.

Shenzhen Shanyun Audio Technology Co., Ltd. 2025-11-1 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen DL Testing Technology Co., Ltd.（101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China）to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with Shenzhen Shanyun Audio Technology Co., Ltd. （Nanshan District E-commerce lnnovationSeryice Base, Room A603, Building G.Shekou United Industrial Vilage, Nanshan District, Shenzhen, Guangdong, China） <Signature>: Name: Jason lu Title: Manager Company: Shenzhen Shanyun Audio Technology Co., Ltd.

Shenzhen Shanyun Audio Technology Co., Ltd. 2025-11-1 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC 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). Sincerely, <Signature>: Name: Jason lu Title: Manager Company: Shenzhen Shanyun Audio Technology Co., Ltd.

Shenzhen Shanyun Audio Technology Co., Ltd. FCC ID: 2BO44-Y15 Product Similarity Declaration Applicant: Shenzhen Shanyun Audio Technology Co., Ltd. Address: Nanshan District E-commerce lnnovationSeryice Base, Room A603, Building G. Shekou United Industrial Vilage, Nanshan District, Shenzhen. Guangdong, China Manufacturer: Shenzhen Shanyun Audio Technology Co., Ltd. Address: Nanshan District E-commerce lnnovationSeryice Base, Room A603, Building G. Shekou United Industrial Vilage, Nanshan District, Shenzhen. Guangdong, China Product Name: smart watch Trade Mark: N/A Model Number: Y15, KC20, KC21, KC22, KC23, KC25, KC26, KC27, K28, KC29, KC30, KC31, KC32, KC33, KC35, KC36, KC37, KC38, KC39 We (Shenzhen Shanyun Audio Technology Co., Ltd.) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), All models are the same as the samples except for the model name, appearance color and watch strap(color, material, shape). <Signature>: Name: Jason lu Title: Manager Company: Shenzhen Shanyun Audio Technology Co., Ltd.

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(External Photos) Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

Size: 10*8mm Model.: Y15 FCC ID: 2BO44-Y15 Label location

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(Internal Photos) ANT Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

FCC ID: 2BO44-Y15 RF Exposure Evaluation According to KDB 447498 D01 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 EIRP=E Meas +20log(d Meas )-104.7 EIRP is the equivalent isotropically radiated power, in dBm E Meas is the field strength of the emission at the measurement distance, in dBμV/m d Meas is the measurement distance, in m Here, Peak Output Power (dBm) Max tune-up (mW) Frequency (MHz) Min. distance(mm) Calc. thresholds limit -3.35 0.46 2402 5 0.14 3.0 So a SAR test is not required

Antenna specification 1 Table of contents 2. Antenna appearance and dimensions3. Detailed information about antenna parameters 1. antenna parameters 2 1. antenna parameters 3 Frequency 2402 ～ 2480MHZ Effi AVG 40.22% PK Gain -1.17dBi SWR <3 Antenna Type On board copper Antenna polarization Linear polarizationPART NO B01 Antenna size L11.8*W0.5mm 2. Antenna appearance and dimensions 4 Antenna No.: B01; Antenna size : L11.8*W0.5mm 3. Detailed information about antenna parameters 5 Antenna Pattern: Antenna Effeciency S11 Parameters Free space Frequency (MHz) Efficiency (%) Efficiency (dBi) Gain(dBi) 2400 39.6 -5.02 -1.17 2410 40.36 -4.94 -1.29 2420 40.48 -4.93 -1.31 2430 41.32 -4.84 -1.22 2440 41.63 -4.81 -1.29 2450 40.93 -4.88 -1.33 2460 40.08 -4.97 -1.25 2470 39.19 -5.07 -1.29 2480 38.37 -5.16 -1.83 AVG 40.22 -4.96 -1.33 The End 6

Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251027116R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 35 FCC Part 15C Test Report FCC ID: 2BO44-Y15 Applicant: Shenzhen Shanyun Audio Technology Co., Ltd. Address: Nanshan District E-commerce lnnovationSeryice Base, Room A603, Building G. Shekou United Industrial Vilage, Nanshan District, Shenzhen. Guangdong, China Manufacturer: Shenzhen Shanyun Audio Technology Co., Ltd. Address: Nanshan District E-commerce lnnovationSeryice Base, Room A603, Building G. Shekou United Industrial Vilage, Nanshan District, Shenzhen. Guangdong, China Product Name: smart watch Trade Mark: N/A Model Number: Y15, KC20, KC21, KC22, KC23, KC25, KC26, KC27, K28, KC29, KC30, KC31, KC32, KC33, KC35, KC36, KC37, KC38, KC39 Date of Receipt: Oct. 27, 2025 Test Date: Oct. 27, 2025 - Nov. 07, 2025 Date of Report: Nov. 07, 2025 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China Applicable Standards: FCC PART 15 C 15.247 ANSI C63.10-2020 Test Result: Pass Report Number: DLE-251027116R Prepared (Test Engineer): Alisa Song Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251027116R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 35 Table of Contents Page 1. . SUMMARY OF TEST RESULTS 4 1.1. MEASUREMENT UNCERTAINTY 4 2. . GENERAL INFORMATION 5 2.1. GENERAL DESCRIPTION OF EUT 5 2.2. DESCRIPTION OF TEST MODES 6 2.3. BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 6 2.4. DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 7 2.5. TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 7 2.6. EQUIPMENTS LIST FOR ALL TEST ITEMS 8 3. . EMC EMISSION TEST 9 3.1. CONDUCTED EMISSION MEASUREMENT 9 3.1.1. POWER LINE CONDUCTED EMISSION LIMITS 9 3.1.2. TEST PROCEDURE 9 3.1.3. DEVIATION FROM TEST STANDARD 9 3.1.4. TEST SETUP 10 3.1.5. EUT OPERATING CONDITIONS 10 3.1.6. TEST RESULTS 11 3.2. RADIATED EMISSION MEASUREMENT 13 3.2.1. RADIATED EMISSION LIMITS 13 3.2.2. TEST PROCEDURE 14 3.2.3. DEVIATION FROM TEST STANDARD 14 3.2.4. TEST SETUP 14 3.2.5. EUT OPERATING CONDITIONS 15 3.2.6. TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) 16 3.2.7. TEST RESULTS (BETWEEN 30MHZ – 1GHZ) 17 3.2.8. TEST RESULTS (1GHZ~25GHZ) 21 3.3 RADIATED BAND EMISSION MEASUREMENT 22 3.3.1 TEST REQUIREMENT: 22 3.3.2 TEST PROCEDURE 22 3.3.3 DEVIATION FROM TEST STANDARD 22 3.3.4 TEST SETUP 23 3.3.5 EUT OPERATING CONDITIONS 23 3.4 CONDUCTED BAND EDGE EMISSION&CONDUCTED SPURIOUS EMISSIONS MEASUREMENT 25 3.4.1 APPLICABLE STANDARD 25 3.4.2 TEST PROCEDURE 25 3.4.3 DEVIATION FROM STANDARD 25 3.4.4 TEST SETUP 25 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251027116R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 35 Table of Contents Page 3.4.5 EUT OPERATION CONDITIONS 25 3.4.6 TEST RESULTS 25 4. . PEAK OUTPUT POWER 28 4.1. APPLIED PROCEDURES / LIMIT 28 4.1.1. TEST PROCEDURE 28 4.1.2. DEVIATION FROM STANDARD 28 4.1.3. TEST SETUP 28 4.1.4. EUT OPERATION CONDITIONS 28 4.1.5. TEST RESULTS 29 5. . POWER SPECTRAL DENSITY TEST 31 5.1. APPLIED PROCEDURES / LIMIT 31 5.1.1. TEST PROCEDURE 31 5.1.2. DEVIATION FROM STANDARD 31 5.1.3. TEST SETUP 31 5.1.4. EUT OPERATION CONDITIONS 31 5.1.5. TEST RESULTS 31 6. . 6DB BANDWIDTH TEST 33 6.1. APPLIED PROCEDURES / LIMIT 33 6.1.1. TEST PROCEDURE 33 6.1.2. DEVIATION FROM STANDARD 33 6.1.3. TEST SETUP 33 6.1.4. EUT OPERATION CONDITIONS 33 6.1.5. TEST RESULTS 33 7. . ANTENNA REQUIREMENT 35 7.1. STANDARD REQUIREMENT 35 7.2. EUT ANTENNA 35 8. . TEST SEUUP PHOTO 35 9. . EUT PHOTO 35 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251027116R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 35 1.. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.247(c) Radiated Spurious Emission PASS 15.205 Band Edge Emission PASS 15.247(b) Peak Output Power PASS 15.247(a)(2) 6dB Bandwidth PASS 15.247(e) Power Spectral Density PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report Test lab: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China FCC Test Firm Registration Number: 854456 Designation Number: CN1307 IC Registered No.: 27485 CAB ID.: CN0118 1.1. MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2，providing a level of confidence of approximately 95 %。 No. Item Uncertainty 1 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% 8 6dB Bandwidth ±0.2MHz 9 Power Spectral Density ±0.3dBm Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251027116R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 35 2.. GENERAL INFORMATION 2.1. GENERAL DESCRIPTION OF EUT Product Name: smart watch Trade Mark: N/A Model Number: Y15, KC20, KC21, KC22, KC23, KC25, KC26, KC27, K28, KC29, KC30, KC31, KC32, KC33, KC35, KC36, KC37, KC38, KC39 Test Model: Y15 Model Difference All models are same as the samples except model name, appearance color and watch strap(c…

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Shenzhen DL Testing Technology Co., Ltd. EUT TEST PHOTO Radiated Measurement Photos Shenzhen DL Testing Technology Co., Ltd. Conducted Measurement Photos ※※※※※ END OF REPORT ※※※※※