2A5W7SND-478Remote Controller

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) thi s device may not cause harmful interference, and (2) thi s device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has bee n tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed t o provide reasonable protection against harmful in terference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be u sed in portable exposure condition without restriction

Shenzhen SND Electronics Co., Ltd. Model Difference Product description: Remote Controller Model name: SND-478/479, CF-011, GA-WII-C03, YD-087 Trade Name: N/A FCC ID: 2A5W7SND-478 All the model are the same circuit and RF module, only for model name. Regards Sincerely Client’s signature: Client’s name / title : Lisa Fu（manager） Contact information / address: 4 Floor, Building1#, Laobing industry, Tiezi Rd, Gongle, Xixiang, Baoan, Shenzhen China

Shenzhen SND Electronics Co., Ltd. (2022.04.01) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Product Name: Remote Controller, Model Number: SND-478/479, FCC ID: 2A5W7SND-478) 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 ☐ N OTE 1 ☐ Internal Photos ☐ N OTE 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: Lisa Fu Title: manager

Shenzhen SND Electronics Co., Ltd. (2022.04.01) 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: Lisa Fu Title: manager

External Photos

Model: SND-478/479 FCC ID: 2A5W7SND-478 Label Location

Internal Photos ANT

Shenzhen CTB Testing Co., Ltd. FCC ID: 2A5W7SND-478 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. BT: 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 3.501 2.244±15.003.16<50.980203.00YES 2.441 3.91 2.464±1 5.003.16<50.988133.00YES 2.480 3.055 2.024±1 5.003.16 <50.995993.00YES 2.402 3.39 2.184±15.003.16<50.980203.00YES 2.441 3.437 2.214±15.003.16<50.988133.00YES 2.480 2.601 1.823±14.002.51<50.791143.00YES 2.402 3.636 2.314±15.003.16<50.980203.00YES 2.441 3.733 2.364±1 5.003.16<50.988133.00YES 2.480 2.863 1.933±1 4.002.51<50.791143.00YES GFSK π /4DQPSK 8DPSK Conclusion: For the max result : 0. 99599W/Kg ≤ FCC Limit 3.0 for 1g SAR.

Shenzhen CTB T esting Technology Co., Ltd. Report No.: CTB220318005RF Report Tel: 4008-707-283Web: http://www.ctb-lab. net Page 1 of 57 TEST REPORT Compiled by: Reviewed by: Approved by: Chen Zheng Arron Liu Bin Mei / Director 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. Product Name: Remote Controller FCC ID: 2A5W7SND-478 Trademark: N/A Model Number: SND-478/479, CF-011, GA-WII-C03, YD-087 Prepared For: Shenzhen SND Electronics Co., Ltd. Address: 4 Floor, Building1#, Laobing industry, Tiezi Rd, Gongle, Xixiang, Baoan, Shenzhen China Manufacturer: Shenzhen SND Electronics Co., Ltd. Address: 4 Floor, Building1#, Laobing industry, Tiezi Rd, Gongle, Xixiang, Baoan, Shenzhen China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: Floor 1&2, Building A, No. 26 of Xinhe Road, Xinqiao Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong China Sample Received Date: Mar. 10, 2022 Sample tested Date: Mar. 10, 2022 to Mar. 18, 2022 Issue Date: Mar. 18, 2022 Report No.: CTB220318005RF Test Standards FCC Part15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB T esting Technology Co., Ltd. Report No.: CTB220318005RF Report Tel: 4008-707-283Web: http://www.ctb-lab. net Page 2 of 57 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 ........................................................... 13 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 ............ 25 8.1 Block Diagram Of Test Setup............................................ 25 8.2 Limit ................................................................. 25 8.3 Test procedure ........................................................ 25 8.4 Test Result ........................................................... 26 9.COUDUCTED PEAK OUTPUT POWER ................................. 33 9.1 Block Diagram Of Test Setup............................................ 33 9.2 Limit ................................................................. 33 9.3 Test procedure ........................................................ 33 9.4 Test Result ........................................................... 34 10.20DB OCCUPIED BANDWIDTH ....................................... 38 10.1 Block Diagram Of Test Setup .......................................... 38 10.2 Limit ................................................................ 38 10.3 Test procedure ....................................................... 38 10.4 Test Result .......................................................... 38 11.CARRIERFREQUENCIES SEPARATION ............................... 42 11.1 Block Diagram Of Test Setup .......................................... 42 11.2 Limit ................................................................ 42 11.3 Test procedure ....................................................... 42 Shenzhen CTB T esting Technology Co., Ltd. Report No.: CTB220318005RF Report Tel: 4008-707-283Web: http://www.ctb-lab. net Page 3 of 57 11.4 Test Result .......................................................... 42 12.HOPPING CHANNEL NUMBER ....................................... 46 12.1 Block Diagram Of Test Setup .......................................... 46 12.2 Limit ................................................................ 46 12.3 Test procedure ....................................................... 46 12.4 Test Result .......................................................... 46 13.DWELL TIME ....................................................... 48 13.1 Block Diagram Of Test Setup .......................................... 48 13.2 Limit ................................................................ 48 13.3 Test procedure ....................................................... 48 13.4 Test Result .......................................................... 49 14.PSEUDORANDOM FREQUENCY ...................................... 53 14.1 Limit ................................................................ 53 14.2 Test procedure ..................................…

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Radiated Emission Below 1G Above 1G