2ADDW-24GA4DRemote controller

Form: RFT-AMER-TCB-OP-19n Revision: 1 Page 1 of 1 Date: 1/25/2023 Shenzhen Topband Co., Ltd Attention: Application Examiner Re: Covered List, located at https://www.fcc.gov/supplychain/coveredlist and 47 CFR parts §2.903 and §2.911(d)(5)(ii) of the FCC rules Applicant: Shenzhen Topband Co., Ltd FCC ID: 2ADDW-24GA4D To whom it may concern, Shenzhen Topband Co., Ltd (“Applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to 47 CFR part §2.903 of the FCC rules and does not originate directly or indirectly from any company named on the covered list located in the link above or any subsidiary or affiliate thereof. Applicant further 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 and is not a subsidiary or affiliate of any such entity pursuant to 47 CFR part §1.50002 and required by 47 CFR part §2.911(d)(5)(ii) of the FCC rules. I HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Applicant and agree to immediately notify Intertek if there is any change in the status identified above. ______________________________ [Signature of authorized Proprietor, Partner or Authorized Officer] [Printed Name] Ou Liang [Title] Certification engineer [Company name] Shenzhen Topband Co., Ltd [Date] 2023-02-22

Form: RFT-AMER-TCB-OP-19o Revision: 1 Page 1 of 1 Date: 1/25/2023 [Shenzhen Topband Co., Ltd] Attention: Application Examiner Re: Certification designating a U.S. agent for service of process pursuant to section 2.911(d)(7) of the FCC rules To whom it may concern, This letter is to confirm both [TUNNU INNOVATION, INC] (“Agent”) and [Shenzhen Topband Co., Ltd] (“Applicant”) acknowledge consent to obligations of each party pursuant to 47 CFR part §2.911(d)(7) of the FCC rules in regard to the agent for service of process. I [Ou Liang] HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Applicant. I further acknowledge the requirement to maintain an agent extends for no less than one year after the termination of all marketing and importation or the conclusion of and commission-related proceeding involving the equipment and agree to immediately notify the FCC if there is any change in the status identified above. Applicant Company Name : Shenzhen Topband Co., Ltd Contact Name : Ou Liang Address : Topband Industrial Park,Liyuan Industrial Zone,Shiyan Town,Bao'An District, Shenzhen, 518108, China Telephone No : 15013453381 Email : [email protected] Applicant FRN : 0024006298 Signature: __________________________ Date: _______2023-02-16_____________________________ I [Li Yanqi] HEREBY CERTIFY THAT I am authorized to make the representations above on behalf of the Agent. I consent to the obligation to accept service of process on behalf of the applicant in regard to all certification applications to the FCC submitted by above applicant and agree to immediately notify the FCC if there is change in this representation. Agent Company Name : TUNNU INNOVATION, INC Contact Name : Li Yanqi Address : 92 CORPORATE PARK STE C 204 IRVINE, CA 92606 Telephone No : 1-626-6017206 Email : [email protected] Agent FRN : 0033438458 Signature: __________________ Date: _______2023-02-16____________________

Shenzhen Topband Co., Ltd [2023-02-22] Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Subject: Limited Agency Agreement Shenzhen Topband Co., Ltd FCC ID: 2ADDW-24GA4D To Whom It May Concern: We, Shenzhen Topband Co., Ltd, hereby authorized Intertek Testing Services Shenzhen Ltd. Guangzhou Branch to act as our Agent for the purpose of preparing application for FCC ID number 2ADDW-24GA4D under all applicable parts of the FCC rules and regulations. The effective date of this limited agency agreement is 2023-02-22. The Limited Agency Agreement expires on 2023-08-21, unless sooner terminated or extended by written notice to Intertek Testing Services Shenzhen Ltd. Guangzhou Branch and the Federal Communications Commission. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. The applicant is not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 U.S.C. 862, and no party to the application is subject to a denial of federal benefits pursuant to that section. If you have any questions or comments, please do not hesitate to contact me. Sincerely, [Signature] [Printed Name]Ou Liang [Type Title]Certification engineer

Shenzhen Topband Co., Ltd [2023-02-22] Attention: Application Examiner RE: Request for Confidentiality Applicant: Shenzhen Topband Co., Ltd FCC ID: 2ADDW-24GA4D To Whom It May Concern: Permanent Confidentiality [Complete this section if permanent confidentiality is requested] Request is hereby submitted by Shenzhen Topband Co., Ltd to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential: [Select one or more of items below, as appropriate] • Schematics • Detailed Block Diagrams • Detailed Operational/Functional Description Rationale for request for confidentiality: Shenzhen Topband Co., Ltd has invested considerable time and materials in research and development to produce the referenced product. [Permanent confidentiality: Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us.] If you have questions or need further information, please contact the undersigned. Since rely, [Signature] [Printed Name] Ou Liang [Type Title] Certification engineer [Company name] Shenzhen Topband Co., Ltd 1(1)

29.63 mm 61 .17 mm 40.00 m m 69.38 mm FCC ID:2ADDW- IC:23804- 24GA4D 24GA4D A4D

Intertek Testing Services Shenzhen Ltd. Guangzhou Branch Room 02, & 101/E201/E301/E401/E501/E601/E701/E801 of Room 01 1-8/F., No. 7-2. Caipin Road, Science City, GETDD, Guangzhou, Guangdong, China Job No.: 230203098GZU FCC ID: 2ADDW-24GA4D RF Exposure Compliance Requirement Calculation formula： E (V/m) = (30*P*G) 0.5/d E = Electric Field (V/m) P = Peak RF output Power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between EUT and antenna (m) Remark: E(V/m)=10 X (dBUV/m) /20 ×10 -6 P=(E*d) 2 /30G in the formula above, d=3m, field strength= 85.6dBuV/m (max described by client), so EIRP= 0.1096mW The worst case test separation distance is 5mm. The product belongs to standalone portable device base the FCC rule part 2.1091&2.1093. The transmission frequencies of the device are between 100 MHz and 6 GHz. In KDB 447498 D01 v06: 4.3.1 Standalone SAR test exclusion considerations: The SAR Test Exclusion Threshold is calculated from: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR ⚫ f(GHz) is the RF channel transmit frequency in GHz ⚫ Power and distance are rounded to the nearest mW and mm before calculation 17 ⚫ The result is rounded to one decimal place for comparison The Max Conducted Output Power and SAR Test Exclusion Threshold (mW) are listed below: Transmit Frequency (MHz) Output power (mW) SAR Test Exclusion Threshold (mW) 2478 0.1096 9.53 According to SAR Exclusion Threshold in KDB 447498 (D01) General RF Exposure Guidance v06, the SAR report is not required. Test Location: Intertek Testing Services Shenzhen Ltd. Guangzhou Branch All tests were performed at: Room102/104, No 203, KeZhu Road, Science City, GETDD Guangzhou, China

Shenzhen Topband Co., Ltd TEST REPORT SCOPE OF WORK EMC TESTING–A4D REPORT NUMBER 230203098GZU-001 ISSUE DATE [REVISED DATE] 03-April-2023 [--------------------] PAGES 22 DOCUMENT CONTROL NUMBER FCC Part 15.249-f © 2017 INTERTEK TEST REPORT Room 02, & 101/E201/E301/ E401/E501/E601/E701/E801 of Room 01 1-8/F., No. 7-2. Caipin Road, Science City, GETDD, Guangzhou, Guangdong, China Telephone: +86 20 8213 9688 Facsimile: +86 20 3205 7538 www.intertek.com.cn This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. Intertek Testing Services Shenzhen Ltd. Guangzhou Branch Room 02, & 101/E201/E301/E401/E501/E601/E701/E801 of Room 01 1-8/F., No. 7-2. Caipin Road, Science City, GETDD, Guangzhou, Guangdong, China Version: 14 December 2022 Page 2 of 22 FCC Part 15.249-f Applicant Name & Address : Shenzhen Topband Co., Ltd Topband Industrial Park,Liyuan Industrial Zone,Shiyan Town, Bao'An District Shenzhen 518108 China Manufacturing Site : Same as applicant Intertek Report No: FCC ID: 230203098GZU-001 2ADDW-24GA4D Test standards 47 CFR PART 15 Subpart C: 2021 section 15.249 Sample Description Product : Remote controller Model No. : A4D Electrical Rating : 3VDC Serial No. : Not Labeled Date Received : 03 February 2023 Date Test Conducted : 09 February 2023-13 March 2023 Prepared and Checked By Elena Lei Engineer Approved By: Dean Liu Project Engineer TEST REPORT Intertek Report No.: 230203098GZU-001 Version: 14 December 2022 Page 3 of 22 FCC Part 15.249-f CONTENT TEST REPORT ........................................................................................................................... 1 CONTENT ............................................................................................................................. 3 1.0 TEST RESULT SUMMARY ............................................................................................ 4 2.0 GENERAL DESCRIPTION .............................................................................................. 5 2.1 PRODUCT DESCRIPTION ........................................................................................................ 5 2.2 RELATED SUBMITTAL(S) GRANTS ............................................................................................ 5 2.3 TEST METHODOLOGY ........................................................................................................... 5 2.4 TEST FACILITY ...................................................................................................................... 5 3.0 SYSTEM TEST CONFIGURATION .................................................................................. 6 3.1 JUSTIFICATION ..................................................................................................................... 6 3.2 EUT EXERCISING SOFTWARE.................................................................................................. 7 3.3 SPECIAL ACCESSORIES ........................................................................................................... 7 3.4 MEASUREMENT UNCERTAINTY ............................................................................................... 7 3.5 EQUIPMENT MODIFICATION .................................................................................................. 7 3.6 SUPPORT EQUIPMENT LIST AND DESCRIPTION .......................................................................... 8 4.0 MEASUREMENT RESULTS ........................................................................................... 9 4.1 ANTENNA REQUIREMENT ...................................................................................................... 9 4.2 OCCUPIED BANDWIDTH ...................................................................................................... 10 4.3 RADIATED EMISSION .......................................................................................................... 12 4.4 BAND EDGES REQUIREMENT ................................................................................................ 19 4.5 CONDUCTED EMISSIONS AT MAINS TERMINALS ...................................................................... 21 5.0 TEST EQUIPMENT LIST ............................................................................................. 22 TEST REPORT Intertek Report No.: 230203098GZU-001 Version: 14 December 2022 Page 4 of 22 FCC Part 15.249-f 1.0 TEST RESULT SUMMARY Test Item Test Requirement Test Method Result Antenna Requirement FCC PART 15 C Section 15.203 FCC PART 15 C Section 15.203 PASS Occupied Bandwidth FCC PART 15 C section 15.215(c) ANSI C63.10: Clause 6.9 PASS Radiated Emission FCC PART 15 C section 15.249 (a), (d) ANSI C63.10: Clause 6.4, 6.5 & 6.6 PASS Band Edges Measurement FCC PART 15 C section 15.249 (d) ANSI C63.10: Clause 6.10 PASS Conducted Emissions at Mains Terminals FCC PART 15 C section 15.207 ANSI C63.10: Clause 6.2 N/A Remark: N/A: not applicable. Refer to the relative section for the details. EUT: In this whole report EUT means Equipment Under Test. Tx: In this whole report Tx (or tx) means Transmitter. Rx: In this whole report Rx (or rx) means Receiver. RF: In this…

Text truncated - open the document above for the full version.

Note:EUT is positioned at the center of the turntable to keep 3 m between the measurement antenna and EUT for the radiated emissions measurements Radiated Emission (30MHz-1000MHz) Radiated Emission (Above 1000MHz)