2AW95LS0102111261Smart Light Bulb A21

Attestation Statements (June 18, 2024) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID: 2AW95LS0102111261 ) (SPRING SUNSHINE TECHNOLOGY CO., LIMITED), the undersigned, hereby authorize (NEWENERGYER LIMITED) to act as our designated U.S. agent for service of process, (SPRING SUNSHINE TECHNOLOGY CO., LIMITED) 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. (NEWENERGYER LIMITED) accepts the responsibility to act as designated U.S. agent for service of process, provides 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 Information： Company name: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Contact Name: Ben Fu Address: Room 2401-2404, 24/F., Fu Fai Commercial Centre 27 Hillier Street, Sheung Wan, Hong Kong Telephone No: 13538214502 Email: [email protected] FRN: 0029869823 Signature [Ben Fu] U.S. Agent Information: Company Name: NEWENERGYER LIMITED Address: 1818 S Patton Ct, Denver, CO, 80219 Contact Name: CHUN LIU Telephone No: 213 289 5042 Email: [email protected] FRN: 0034665885 Signature [CHUN LIU]

(SPRING SUNSHINE TECHNOLOGY CO., LIMITED) (June 18, 2024) 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: 2AW95LS0102111261) [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] (“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. Sincerely, (Applicant signature) (Applicant printed name) Ben Fu (SPRING SUNSHINE TECHNOLOGY CO., LIMITED) (June 18, 2024) 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: 2AW95LS0102111261) [SPRING SUNSHINE TECHNOLOGY CO., LIMITED] (“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) Ben Fu

SPRING SUNSHINE TECHNOLOGY CO., LIMITED (June 18, 2024) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Smart Light Bulb A21 / LS0102111261 / FCC ID: 2AW95LS0102111261) 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: Ben Fu Title: Manager

SPRING SUNSHINE TECHNOLOGY CO., LIMITED (June 18, 2024) 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: Ben Fu Title: Manager

Shenzhen CTB Testing Technology Co., Ltd. Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 3 Model: LS0102111261 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: 2AW95LS0102111261 Model No.: LS0102111261

FCC §15.247 (i), §2.1091 – RF Exposure FCC ID: 2AW95LS0102111261 Applied procedures / limit According to FCC §15.247(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. 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 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 2.4G WIFI 802.11b&2 437 14±1 15 31.6228 0.4111 (-3.86dBi) 0.0026 1 Pass BLE GFSK&HC H 1±1 2 1.5849 0.4111 (-3.86dBi) 0.0001 1 Pass

www.leedarson.com ▏Better Life with Better IoT Innovation Rev. 1.0 Antenna Specification Antenna picture Antenna Type Internal inverted F PCB antenna Antenna Peak Gain -3.86 dBi Operating Band 2400 MHz ~ 2483.5 MHz Test laboratory name and Address IoT Antenna Test Laboratory, 3 / A,LEEDARSON LIGHTING CO., LTD. Xingtai Industrial Park, Changtai Economic Development Zone, Zhangzhou, 363900, China Antenna Manufacturer LEEDARSON LIGHTING CO., LTD. Model name A21 1600lm RGBTW DUT photo Test Date 2023-12-20 Test Conductor Zhu Wei ANT Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 1 OTA measurement Test System The SY-16 OTA system and RayZone2800 OTA system are anechoic chambers, which can measures antenna passive data such as antenna efficiency, antenna gain, and 2D&3D pattern. The systems are shown as follow: Figure 1 SY-16 OTA system Figure 2 RayZone2800 OTA system Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 2 Equipment List Table 1 Equipment List Used Equipment Manufacturer Model No. Serial No. Last Cal. Due Date ☒ Network Analyzer Keysight E5071C MY46527808 2024/1/9 2025/1/8 ☐ Network Analyzer Keysight E5071C MY46108051 2023/4/20 2024/4/19 ☒ Anechoic Chamber Sunyield SY-16 SI1727 2023/5/10 2024/5/9 ☐ Anechoic Chamber General Test System RayZone2800 CT10121244 B5079 2023/5/20 2024/5/19 Test Method Table 2 Test Method Name Antenna Performance Parameter Radiation Efficiency Test Method IEEE Standard Test Procedures for Antennas Standard No. ANSI/IEEE Std 149-2021 Test Software PMS-V2.8.5 ☒ MaxSign-V1.4.3 ☐ Test Result Efficiency and Gain Table 3 Antenna Efficiency and Gain Frequency (MHz) Gain (dBi) Efficiency (dB) Efficiency (%) 2400 -4.00 -8.73 13.41 2410 -3.94 -8.63 13.71 2420 -4.19 -8.76 13.30 2430 -4.02 -8.46 14.25 2440 -3.86 -8.16 15.29 2450 -4.03 -8.37 14.55 2460 -4.05 -8.32 14.73 2470 -3.96 -8.04 15.70 2480 -3.88 -7.91 16.18 2490 -4.05 -7.95 16.01 2500 -4.20 -7.99 15.89 Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 3 Radiation Pattern Table 4 Product coordinates Product Coordinates Table 5 3D radiation pattern 3D Radiation Pattern at 2450MHz Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 4 Table 6 Radiation pattern in XY Plane 2D Radiation Pattern ( θ = 90°, XY Plane) Table 7 Radiation pattern in XZ Plane 2D Radiation Pattern ( φ = 0°, XZ Plane) Antenna Information www.leedarson.com ▏Better Life with Better IoT Innovation 5 Table 8 Radiation pattern in YZ Plane 2D Radiation Pattern ( φ = 90°, YZ Plane)

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: Smart Light Bulb A21 FCC ID: 2AW95LS0102111261 Trademark: Linkind Model Number: LS0102111261 Prepared For: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: Room 2401-2404,24/F.,Fu Fai Commercial Centre27 Hillier Street,Sheung Wan, Hong Kong Manufacturer: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: FLAT/RM 01-04, 24/F, FU FAI COMMERCIAL CENTRE, 27 HILLIER STREET, SHEUNG WAN, HK 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: May. 23, 2024 Sample tested Date: May. 23, 2024 to Jun. 4, 2024 Issue Date: Jun. 4, 2024 Report No.: CTB240604065RFX Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240604065RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 40 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 .................................................................................. 10 6.1 Block Diagram Of Test Setup ........................................................................................................... 10 6.2 Limit .................................................................................................................................................. 10 6.3 Test procedure ................................................................................................................................. 10 6.4 Test Result ....................................................................................................................................... 12 7. RADIATED SPURIOUS EMISSION ............................................................................................... 14 7.1 Block Diagram Of Test Setup ........................................................................................................... 14 7.2 Limit .................................................................................................................................................. 14 7.3 Test procedure ................................................................................................................................. 15 7.4 Test Result ....................................................................................................................................... 16 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ................................................ 23 8.1 Block Diagram Of Test Setup ........................................................................................................... 23 8.2 Limit .................................................................................................................................................. 23 8.3 Test procedure ................................................................................................................................. 23 8.4 Test Result ....................................................................................................................................... 24 9. COUDUCTED OUTPUT POWER .................................................................................................. 28 9.1 Block Diagram Of Test Setup .........…

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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: Smart Light Bulb A21 FCC ID: 2AW95LS0102111261 Trademark: Linkind Model Number: LS0102111261 Prepared For: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: Room 2401-2404,24/F.,Fu Fai Commercial Centre27 Hillier Street,Sheung Wan, Hong Kong Manufacturer: SPRING SUNSHINE TECHNOLOGY CO., LIMITED Address: FLAT/RM 01-04, 24/F, FU FAI COMMERCIAL CENTRE, 27 HILLIER STREET, SHEUNG WAN, HK 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: May. 23, 2024 Sample tested Date: May. 23, 2024 to Jun. 4, 2024 Issue Date: Jun. 4, 2024 Report No.: CTB240604066RFX Test Standards FCC CFR Title 47 Part 15 Subpart C Section 15.247 ANSI C63.10:2013 Test Results PASS Remark: This is WIFI-2.4GHz band radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240604066RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 63 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 ............................. 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 ............ 39 8.1 Block Diagram Of Test Setup ........................................... 39 8.2 Limit ................................................................. 39 8.3 Test procedure ........................................................ 39 8.4 Test Result ........................................................... 40 9. COUDUCTED OUTPUT POWER ....................................... 47 9.1 Block Diagram Of Test Setup ........................................... 47 9.2 Limit ................................................................. 47 9.3 Test procedure ........................................................ 47 9.4 Test Result ........................................................... 48 10. 6DB OCCUPIED BANDWIDTH......................................... 49 10.1 Block Diagram Of Test Setup .......................................... 49 10.2 Limit ................................................................ 49 10.3 Test procedure ....................................................... 49 10.4 Test Result .......................................................... 50 11. POWER SPECTRAL DENSITY ........................................ 55 11.1 Block Diagram Of Test Setup .......................................... 55 11.2 Limit ................................................................ 55 Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240604066RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 63 11.3 Test procedure ....................................................... 55 11.4 Test Result .......................................................... 56 12. ANTENNA REQUIREMENT ........................................... 61 13. EUT TEST SETUP PHOTOGRAPHS ................................... 62 (Note: N/A means not applicable) Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240604066RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 63 1. VERSION Report No. Issue Date Description Approved CTB240604066RFX Jun. 4, 2024 Original Valid Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB240604066RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 5 of 63 2. TEST SUMMARY The Product has been tested according to the following specifications: Test Item Test Requirement Test method Result AC Power Line Conducted Emission 47 CFR Part 15 Subpart C Section 15.207 ANSI C63.10-2013 PASS Radiated Spu…

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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: LS0102111261 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