2BW97-GS3-F050GS3 String Lights

SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 [August 7, 2026] U.S. Agent Designation [SHENZHEN JINDIANZHIGUANG LIGHTING 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: 2BW97-GS3-F050 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 [SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD]. [SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD] with the FRN [0038684510] 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 [Li Jie] [Huiying Fan] [manager] [Director] [SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD] [GLOCERTS TECHNOLOGY INC]

SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD (August 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: 2BW97-GS3-F050 [SHENZHEN JINDIANZHIGUANG LIGHTING 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)Li Jie SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD (August 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: 2BW97-GS3-F050 [SHENZHEN JINDIANZHIGUANG LIGHTING 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)Li Jie

SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD (August 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (GS3 String Lights / GS3-F050, GS3- F100, GS3-F150, GS3-F200, GS3-F250, GS3-F300, GS3-F350, GS3-F400, GS4-F050 GS4-F100, GS4-F150, GS4-F200, GS4-F250, GS4-F300, GS4-F350, GS4-F400, GS5-F050, GS5-F100, GS5-F150, GS5-F200, GS5-F250, GS5-F300, GS5-F350, GS5-F400, GS6-F050 GS6-F100, GS6-F150, GS6-F200, GS6-F250, GS6-F300, GS6-F350, GS6-F400, C6505-A, C6505-B, C6505-C, C6505-D, C6505-E, C6505-F, C6505-G, C6505-H, C6505-I, C6505-J, C6505-K, C6508-A, C6508-B, C6508-C, C6508-D, C6508-E, C6508-F, C6508-G, C6508-H, C6508-I, C6508-J, C6508-K, C6509-A, C6509-B, C6509-C, C6509-D, C6509-E, C6509-F, C6509-G, C6509-H, C6509-I, C6509-J, C6509-K, C6308-A, C6308-B, C6308-C, C6308-D, C6308-E, C6308-F, C6308-G, C6308-H, C6308-I, C6308-J, C6308-K / FCC ID: 2BW97-GS3-F050) 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: Li Jie Title: manager

SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD (August 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: Li Jie Title: manager

SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD Model Difference Data：August 5, 2026 Product description: GS3 String Lights Model name: GS3-F050, GS3-F100, GS3-F150, GS3-F200, GS3-F250, GS3- F300, GS3-F350, GS3-F400, GS4-F050 GS4-F100, GS4-F150, GS4-F200, GS4-F250, GS4-F300, GS4-F350, GS4-F400, GS5-F050, GS5-F100, GS5- F150, GS5-F200, GS5-F250, GS5-F300, GS5-F350, GS5-F400, GS6-F050 GS6-F100, GS6-F150, GS6-F200, GS6-F250, GS6-F300, GS6-F350, GS6- F400, C6505-A, C6505-B, C6505-C, C6505-D, C6505-E, C6505-F, C6505-G, C6505-H, C6505-I, C6505-J, C6505-K, C6508-A, C6508-B, C6508-C, C6508- D, C6508-E, C6508-F, C6508-G, C6508-H, C6508-I, C6508-J, C6508-K, C6509-A, C6509-B, C6509-C, C6509-D, C6509-E, C6509-F, C6509-G, C6509-H, C6509-I, C6509-J, C6509-K, C6308-A, C6308-B, C6308-C, C6308- D, C6308-E, C6308-F, C6308-G, C6308-H, C6308-I, C6308-J, C6308-K Trade Name: APPECK FCC ID: 2BW97-GS3-F050 All the model are the same circuit and RF module, only the names, lampshade and the number of lights are different. Regards Sincerely Client’s signature : Client’s name / title : Li Jie（manager） Contact information / address：Room 903, Building 1, No. 22 Ping'an Road, Zhangxi Community, Guanhu Sub-district, Longhua District, Shenzhen, Guanadong, China.

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 4 Model: GS3-F050 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: 2BW97-GS3-F050 Model No.: GS3-F050

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2BW97-GS3-F050 Applied procedures / limit According to FCC §15.247(i) and §1.1310 e 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. Limits for Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842 / f 4.89 / f (900 / f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-100,000 5 6 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/ cm 2 ) Averaging Time |E| 2 ,|H| 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-100,000 1.0 30 Note: f = frequency in MHz * = Plane-wave equivalent power density MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna,R=20cm Test Result of RF Exposure Evaluation BT+WIFI supported simultaneous transmission: BLE+2.4GWIFI: ∑MPE Ratio =0.0007/1+0.013/1=0.0137≤1, So passed. Modes& Channel Freq. (MHz) Tune up Produce power Maximu m peak output power (dBm) Output power to antenna (mW) Antenna Gain (numeric) Power Density (S) (mW/ cm2) Limit (mW / cm2 ) Result BLE GFSK& LCH 1±1 2 1.5849 2.0797 (3.18dBi) 0.0007 1 Pass 2.4G WIFI 802.11n(H T20)&241 2 14±1 15 31.6228 2.0701 (3.16dBi) 0.013 1 Pass

Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 37 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. The tested sample(s) and the sample information are provided by the applicant. The authenticity, accuracy, and completeness of the provided information are the sole responsibility of the applicant. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The result decision rules of our laboratory are based solely on the direct comparison between the actual measured values of test results and the standard limits, without considering the measurement uncertainty.“” indicates the testing items were fulfilled by subcontracted lab. “” indicates the items are not in CNAS accreditation scope. Test item description: GS3 String Lights FCC ID: 2BW97-GS3-F050 Trademark(s): APPECK Model/Type reference: GS3-F050, For other series models, refer to Section 4.1. Applicant’s name: SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD Address: Room 903, Building 1, No. 22 Ping'an Road, Zhangxi Community, Guanhu Sub-district, Longhua District, Shenzhen, Guanadong, China. Manufacturer: SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD Address: Room 903, Building 1, No. 22 Ping'an Road, Zhangxi Community, Guanhu Sub-district, Longhua District, Shenzhen, Guanadong, 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, S henzhen, Guangdong, China Sample Received Date: Jun. 12, 2026 Sample tested Date: Jun. 12, 2026 to Jul. 16, 2026 Issue Date: Jul. 16, 2026 Report No.: CTB26061208002RF01 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.: CTB26061208002RF01 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 37 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 ..................................................................................................................................... 8 4.5 Test Mode ........................................................................................................................................ 8 4.6 Test Environment ............................................................................................................................. 8 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................................................... 9 5.1 Test Facility ...................................................................................................................................... 9 5.2 Test Instrument Used ....................................................................................................................... 9 6. AC POWER LINE CONDUCTED EMISSION ................................................................................ 12 6.1 Block Diagram Of Test Setup ......................................................................................................... 12 6.2 Limit ................................................................................................................................................ 12 6.3 Test procedure ............................................................................................................................... 12 6.4 Test Result ..................................................................................................................................... 14 7. RADIATED SPURIOUS EMISSION ............................................................................................. 16 7.1 Block Diagram Of Test Setup ......................................................................................................... 16 7.2 Limit ................................................................................................................................................ 16 7.3 Test procedure ............................................................................................................................... 16 7.4 Test Result ..................................................................................................................................... 18 8. BAND EDGE AND RF CONDUCTED SPURIOUS EMISSIONS .................................................. 25 8.1 Block Diagram Of Test Setup ......................................................................................................... 25 8.2 Limit .......................................................................................................…

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Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 64 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. The tested sample(s) and the sample information are provided by the applicant. The authenticity, accuracy, and completeness of the provided information are the sole responsibility of the applicant. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The result decision rules of our laboratory are based solely on the direct comparison between the actual measured values of test results and the standard limits, without considering the measurement uncertainty.“” indicates the testing items were fulfilled by subcontracted lab. “” indicates the items are not in CNAS accreditation scope. Test item description: GS3 String Lights FCC ID: 2BW97-GS3-F050 Trademark(s): APPECK Model/Type reference: GS3-F050, For other series models, refer to Section 4.1. Applicant’s name: SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD Address: Room 903, Building 1, No. 22 Ping'an Road, Zhangxi Community, Guanhu Sub-district, Longhua District, Shenzhen, Guanadong, China. Manufacturer: SHENZHEN JINDIANZHIGUANG LIGHTING CO., LTD Address: Room 903, Building 1, No. 22 Ping'an Road, Zhangxi Community, Guanhu Sub-district, Longhua District, Shenzhen, Guanadong, 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: Jun. 12, 2026 Sample tested Date: Jun. 12, 2026 to Jul. 16, 2026 Issue Date: Jul. 16, 2026 Report No.: CTB26061208002RF02 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.: CTB26061208002RF02 Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 64 TABLE OF CONTENT Test Report Declaration Page 1. VERSION ........................................................................................................................................................ 4 2. TEST SUMMARY .......................................................................................................................................... 5 3. MEASUREMENT UNCERTAINTY............................................................................................................. 6 4. PRODUCT INFORMATION AND TEST SETUP ..................................................................................... 7 4.1 Product Information .................................................................................................................................................... 7 4.2 Test Setup Configuration .......................................................................................................................................... 7 4.3 Support Equipment ..................................................................................................................................................... 7 4.4 Channel List .................................................................................................................................................................. 8 4.5 Test Mode ...................................................................................................................................................................... 8 4.6 Test Environment ........................................................................................................................................................ 8 5. TEST FACILITY AND TEST INSTRUMENT USED ................................................................................ 9 5.1 Test Facility ................................................................................................................................................................... 9 5.2 Test Instrument Used ................................................................................................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION .......................................................................................... 12 6.1 Block Diagram Of Test Setup ................................................................................................................................ 12 6.2 Limit ............................................................................................................................................................................... 12 6.3 Test procedure ........................................................................................................................................................... 12 6.4 Test Result .................................................................................................................................................................. 14 7. RADIATED SPURIOUS EMISSION ........................................................................................................ 16 7.1 Block Diagram Of Test Setup ................................................................................................................................ 16 7.2 Limit ............................................................................................................................................................................... 16 7.3 Test procedure ........................................................................................................................................................... 17 7.4 Test Res…

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OTA TEST REPORT TA Technology (Shanghai) Co., Ltd. tested the above equipment in accordance with the requirements in ANSI/IEEE Std 149-2008. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. Prepared by: Peng Tao Approved by: Kai Xu TA Technology (Shanghai) Co., Ltd. No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China TEL: +86‐021‐50791141/2/3 FAX: +86‐021‐50791141/2/3‐8000 Applicant Espressif System (Shanghai) Co.,Ltd Product ESP32-C3-WROOM-02 Model ESP-ANT B Report No. Y2102A0260-T3 Issue Date March 9, 2021 OTA Test Report Report No: Y2102A0260-T3 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 2 of 13 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. TABLE OF CONTENTS 1. Test Laboratory .............................................................................................................................. 3 1.1. Notes of the Test Report ................................................................................................... 3 1.2. Test facility ........................................................................................................................ 3 1.3. Testing Location ................................................................................................................ 3 1.4. Laboratory Environment .................................................................................................... 4 2. General Description of Equipment under Test ............................................................................... 5 2.1. Applicant and Manufacturer Information ............................................................................ 5 2.2. General information ........................................................................................................... 5 2.3. Test Date ........................................................................................................................... 5 2.4. Receiving Date .................................................................................................................. 5 2.5. Applied Standards ............................................................................................................. 6 3. Test Conditions .............................................................................................................................. 7 3.1. Test Configuration ............................................................................................................. 7 3.2. Test Measurement ............................................................................................................. 7 4. Test Results ................................................................................................................................... 8 4.1. Gain and Efficiency ............................................................................................................ 8 5. Equipment List ............................................................................................................................... 9 ANNEX A 3-D Pattern Plots ................................................................................................................... 10 ANNEX B：The EUT Appearance and Test Configuration ...................................................................... 12 B.1 EUT Appearance ................................................................................................................... 12 B.2 Test Configuration ................................................................................................................. 13 OTA Test Report Report No: Y2102A0260-T3 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 3 of 13 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 1. Test Laboratory 1.1. Notes of the Test Report This report shall not be reproduced in full or partial, without the written approval of TA technology (shanghai) co., Ltd. The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein .Measurement Uncertainties were not taken into account and are published for informational purposes only. This report is written to support regulatory compliance of the applicable standards stated above. 1.2. Test facility A2LA (Certificate Number: 3857.01) TA Technology (Shanghai) Co., Ltd. has been listed by American Association for Laboratory Accreditation to perform measurement. 1.3. Testing Location Company: TA Technology (Shanghai) Co., Ltd. Address: No.145, Jintang Rd, Tangzhen Industry Park, Pudong Shanghai, China City: Shanghai Post code: 201201 Country: P. R. China Contact: Xu Kai Telephone: +86-021-50791141/2/3 Fax: +86-021-50791141/2/3-8000 Website: http://www.ta-shanghai.com E-mail: [email protected] OTA Test Report Report No: Y2102A0260-T3 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 4 of 13 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 1.4. Laboratory Environment Temperature Min. =19°C，Max. = 25°C Relative humidity Min. =40%，Max. =72% Shield effect 0.7-6GHz > 100dB Ground resistance <0.5 OTA Test Report Report No: Y2102A0260-T3 TA Technology (Shanghai) Co., Ltd. TA-MB-04-008O P age 5 of 13 This report shall not be reproduced except in full, without the written approval of TA Technology (Shanghai) Co., Ltd. 2. General Description of Equipment under Test 2.1. Applicant and Manufacturer Information Applicant Name Espressif System (Shanghai) Co.,Ltd Applicant address Suite 204 Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China Manufacturer Name Espressif System (Shanghai) Co.,Ltd Manufacturer address Suite 204 Block 2, 690 Bibo Road, Zhang Jiang Hi-Tech Park, Shanghai, China 2.2. …

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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: GS3-F050 Test Setup Photos of EUT 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