2ARLM-CST-3A2.4G REMOTE CONTROL

FCC Warning: Please take attention that changes or modification not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.This device complies with Part 15 of the FCC Rules.Operation is subject to the following two conditions:(1) This device may not cause harmful interference, and.(2) This device must accept any interference received, including interference that may cause undesired operation.

UNITED STATES DESIGNATED AGENT LETTER Date: 2023/06/15 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Applicant U.S. designated agent Company Name: Pinghu City Cang Sheng Plastic Factory Company Name: USA MEIHUA TRADING INC Grantee Code: 2ARLM FRN: 0033406166 Contact Name: Zheng Biao Contact Name: Harley Quinn Address: Group22, Zhonghua Village, Xincang Town, Address: 5379 Pine Valley Ct City/Province/Zip: Pinghu City, Zhejiang Province, China City/Province/Zip: Boulder CO 80301 United States Telephone: 13906733836 Telephone: (312) 363-9424 Fax: 0573-85745437 Fax: N/A Email: [email protected] Email: meihua-trading- [email protected] Applicable Equipment: FCC ID: 2ARLM-CST-3A ATTN: Director of Certification: zhengbiao We, Pinghu City Cang Sheng Plastic Factory and USA MEIHUA TRADING INC understand and acknowledge the applicants consent and the designated agent’s obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e- mail of the designated agent listed above. We, Pinghu City Cang Sheng Plastic Factory and USA MEIHUA TRADING INC acknowledge the applicant’s acceptance of its obligation to maintain an agent for service of process in the United States for no less than one 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. Applicant U.S. designated agent Name (Printed): Zheng Biao Name (Printed): Harley Quinn Title: Engineer Title: Manager Signature: Signature:

Applicant Declaration QSF27-14-04 Rev 1.0 Rev. Feb 6, 2023 Page 1 of 1 Original Issue: Jan. 4, 2021 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name Pinghu City Cang Sheng Plastic Factory Address Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Grantee Code 2ARLM FCC ID 2ARLM-CST-3A Authorized Contact Name Zheng Biao Contact Email [email protected] Contact Phone 13906733836 I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e) in accordance with ISO 17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements. (1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g) the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc.(TCB) terms and conditions. Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Link to the Covered List: Covered List Pinghu City Cang Sheng Plastic Factory (“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. Pinghu City Cang Sheng Plastic Factory (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered list, established pursuant to §1.50002, as an entity producing “covered” equipment. Applicant Signature: Date: 2023-06-19 Print Name: Zheng Biao Title: Engineer *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database

Pinghu City Cang Sheng Plastic Factory Current Date: 2023-06-01 To: SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. No. 588 West Jindu Road, Songjiang District, Shanghai, China. 201612 Dear Sir/Madam, Subject: Declaration Letter about Identity of Products *WE (Pinghu City Cang Sheng Plastic Factory) HEREBY DECLARED THAT Product Description 2.4G REMOTE CONTROL Model No. CST-3B Manufacturer’s Name Pinghu City Cang Sheng Plastic Factory Manufacturer’s Address Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China *Except that the model number and appearance deviation, are identical with the original product as follows: Note: The definition of identical should be “electrically identical”. A device will be considered to be electrically identical if no changes are made to the devices’ schematics, board layouts, component layouts, chip sets, resistors and all other electrical aspects of the device are identical. with the model(s) below which samples we chose to be tested by SGS Model No. (型号): CST-3A Manufacturer’s Name (生产商名称): Pinghu City Cang Sheng Plastic Factory Manufacturer’s Address（生产商商地址): Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Sincerely, Signature (签字): Printed Name (姓名): Biao Zheng Position/Title (职位): engineer Contact Number (联系电话): 13906733836

Pinghu City Cang Sheng Plastic Factory To: SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia United States From: Company Name: Pinghu City Cang Sheng Plastic Factory Address: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Regarding: Confidentiality Request regarding application for FCC ID: 2ARLM-CST-3A LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commission’s rules, the applicant hereby request confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. Sincerely, Signature: Printed Name (on file with the FCC associated with the Grantee Code): Zheng Biao Title: Engineer Company Name: Pinghu City Cang Sheng Plastic Factory

Pinghu City Cang Sheng Plastic Factory Date: 2023/04/27 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: 2ARLM-CST-3A To whom it may concern: We, the undersigned, hereby authorize Parlam Zhan to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with Pinghu City Cang Sheng Plastic Factory. This authorization is valid until further written notice from the applicant. Name (Printed): Zheng Biao Title: Engineer Signature: On behalf of Company: Pinghu City Cang Sheng Plastic Factory Telephone: 13906733836

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 1 of 4 External Photos for SHCR2305000969AT SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 2 of 4 EUT Constructional Details (EUT Photos) SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 3 of 4 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 4 of 4

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 1 of 3 Internal Photos for SHCR2305000969AT SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 2 of 3 EUT Constructional Details (EUT Photos) SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 3 of 3

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096902 Page: 1 of 10 Parlam Zhan Laboratory Manager 1 Cover Page RF Exposure Evaluation Report Application No.: SHCR2305000969AT FCC ID: 2ARLM-CST-3A Applicant: Pinghu City Cang Sheng Plastic Factory Address of Applicant: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Manufacturer: Pinghu City Cang Sheng Plastic Factory Address of Manufacturer: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Factory: Pinghu City Cang Sheng Plastic Factory Address of Factory: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Equipment Under Test (EUT): EUT Name: 2.4G REMOTE CONTROL Model No.: CST-3A Add Model No.: CST-3B Standard(s) : FCC Rules 47 CFR §2.1093 KDB 447498 D04 interim General RF Exposure Guidance v01 Date of Receipt: 2023-05-16 Date of Test: 2023-05-16 to 2023-05-29 Date of Issue: 2023-06-12 Test Result: PASS* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096902 Page: 2 of 10 Revision Record Version Description Date Remark 00 Original 2023-06-12 / Authorized for issue by: Bill Wu/Project Engineer Parlam Zhan / Reviewer SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096902 Page: 3 of 10 2 Contents Page 1 COVER PAGE .......................................................................................................................................... 1 2 CONTENTS ............................................................................................................................................... 3 3 GENERAL INFORMATION ..................................................................................................................... 4 3.1 GENERAL DESCRIPTION OF E.U.T. ..................................................................................................... 4 3.2 DETAILS OF E.U.T. ............................................................................................................................. 4 3.3 SEPARATION DISTANCE............................................................................................................................ 5 3.4 TEST LOCATION.................................................................................................................................. 5 3.5 TEST FACILITY .................................................................................................................................... 6 4 TEST STANDARDS AND LIMITS .......................................................................................................... 7 5 FCC RADIOFREQUENCY RADIATION EXPOSURE LIMITS ............................................................. 7 5.1 BLANKET 1 MW BLANKET EXEMPTION ..................................................................................................... 7 5.2 MPE-BASED EXEMPTION ......................................................................................................................... 7 5.3 SAR-BASED EXEMPTION .......................................................................................................................... 8 6 MEASUREMENT AND CALCULATION .............................................................................................. 10 6.1 RF EXPOSURE CALCULATION ................................................................................................................. 10 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096902 Page: 4 of 10 3 General Information 3.1 General Description of E.U.T. Power supply: DC 3V By 2*AAA size batteries 3.2 Details of E.U.T. Operation Frequency: 2402MHz to 2480MHz Modulation Type: GFSK Channel Spacing: 1MHz Number of Channels: 27 Antenna Type: PCB Antenna Antenna Gain: 1.6dBi (Provided by manufacturer) Channel List Table: channel number frequency channel number frequency 0 2402 14 2441 1 2414 15 2444 2 2415 16 2446 3 2416 17 2452 4 2417 18 2454 5 2419 19 2456 6 2421 20 2462 7 2426 21 2464 8 2428 22 2465 9 2429 23 2467 10 2430 24 2469 11 2431 25 2473 12 2433 26 2480 13 2439 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096902 Page: 5 of 10 3.3 Separation Distance Separation distance between the antenna to person (R): ＜5mm Remark: This minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander. 3.4 Test Location All tests were performed at: SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. 588 West Jindu Road, Xinqiao, Songjiang, 201612 Shanghai, China. Tel: +86 21 6191 5666 Fax: +86 21 6191 5678 No tests were sub-contracted. Note: 1. SGS is not responsible for wrong test results due to incorrect information (e.g. max. clock frequency, highest internal frequency, antenna gain, cable loss, etc ) is provided by the applicant. (if applicable). 2. SGS is not responsible for the authenticity, integrity and the validity of the conclusion based on results of the data provided by applicant. (if applicable). SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096902 Page: 6 of 10 3.5 Test Facility The test facility is recognized, certified, or accredited by the following organizations: • A2LA (Certificate No. 6332.01) SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. is accredited by the American Association for Laboratory Accreditation(A2LA). • FCC (Designation Number: CN1301) SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. has been recognized as an accredited testing laboratory. • ISED (CAB Identifier: CN0020) SGS-CSTC Standards Technical Services (Shanghai) C…

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Justification statement for Antenna To: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: 2ARLM-CST-3A Dear Sir/Madam, Only radiated measurements are used for EUT with FCC ID: 2ARLM-CST-3A to show compliance with FCC limits for fundamental and spurious emissions. All measurements were performed radiated and therefore additional antenna gain documentation is not required. The detailed information for antenna as below shows: Design Specifications Typical Antenna Type PCB antenna Working Frequency 2402MHz to 2480MHz Overall Dimensions As below

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096901 Page: 1 of 33 Parlam Zhan Laboratory Manager TEST REPORT Application No.: SHCR2305000969AT FCC ID: 2ARLM-CST-3A Applicant: Pinghu City Cang Sheng Plastic Factory Address of Applicant: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Manufacturer: Pinghu City Cang Sheng Plastic Factory Address of Manufacturer: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Factory: Pinghu City Cang Sheng Plastic Factory Address of Factory: Group22, Zhonghua Village, Xincang Town, Pinghu City, Zhejiang Province, China Equipment Under Test (EUT): EUT Name: 2.4G REMOTE CONTROL Model No.: CST-3A, CST-3B Remark: Please refer to section 2 of this report which indicates which model was actually tested and which were electrically identical. Standard(s) : 47 CFR Part 15, Subpart C 15.249 Date of Receipt: 2023-05-16 Date of Test: 2023-05-16 to 2023-05-29 Date of Issue: 2023-06-12 Test Result: PASS* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096901 Page: 2 of 33 Revision Record Version Description Date Remark 00 Original 2023-06-12 / Authorized for issue by: Bill Wu/Project Engineer Parlam Zhan / Reviewer SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096901 Page: 3 of 33 2 Test Summary Item FCC Requirement Method Result Antenna Requirement 47 CFR Part 15, Subpart C 15.249 N/A Pass Item FCC Requirement Method Result 20dB Bandwidth 47 CFR Part 15, Subpart C 15.249 ANSI C63.10 (2013) Section 6.9 Pass Field Strength of the Fundamental Signal (15.249(a)) 47 CFR Part 15, Subpart C 15.249 ANSI C63.10 (2013) Section 6.5&6.6 Pass Restricted Band Around Fundamental Frequency 47 CFR Part 15, Subpart C 15.249 ANSI C63.10 (2013) Section 6.4&6.5&6.6 Pass Radiated Emissions 47 CFR Part 15, Subpart C 15.249 ANSI C63.10 (2013) Section 6.4&6.5&6.6 Pass Note: There are series models mentioned in this report, and they are the similar in electrical and electronic characters. Only the model CST-3A was tested since their differences were the model number and appearance. SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096901 Page: 4 of 33 3 Contents Page 1 COVER PAGE ........................................................................................................................................ 1 2 TEST SUMMARY .................................................................................................................................. 3 3 CONTENTS ........................................................................................................................................... 4 4 GENERAL INFORMATION .................................................................................................................... 5 4.1 DETAILS OF E.U.T. .......................................................................................................................... 5 4.2 DESCRIPTION OF SUPPORT UNITS ..................................................................................................... 5 4.3 MEASUREMENT UNCERTAINTY........................................................................................................... 5 4.4 TEST LOCATION ............................................................................................................................... 7 4.5 TEST FACILITY ................................................................................................................................. 7 4.6 DEVIATION FROM STANDARDS ........................................................................................................... 7 4.7 ABNORMALITIES FROM STANDARD CONDITIONS................................................................................... 7 5 EQUIPMENT LIST ................................................................................................................................. 8 6 RADIO SPECTRUM TECHNICAL REQUIREMENT ............................................................................... 9 6.1 ANTENNA REQUIREMENT .................................................................................................................. 9 7 RADIO SPECTRUM MATTER TEST RESULTS ...................................................................................10 7.1 20DB BANDWIDTH ..........................................................................................................................10 7.2 FIELD STRENGTH OF THE FUNDAMENTAL SIGNAL (15.249(A)) ..............................................................13 7.3 RESTRICTED BAND AROUND FUNDAMENTAL FREQUENCY....................................................................15 7.4 RADIATED EMISSIONS .....................................................................................................................22 8 TEST SETUP PHOTO ..........................................................................................................................33 9 EUT CONSTRUCTIONAL DETAILS (EUT PHOTOS) ...........................................................................33 SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Report No.: SHCR230500096901 Page: 5 of 33 4 General Information 4.1 Details of E.U.T. Power supply: DC 3V By 2*AAA size batteries Test voltage: DC 3V Operation Frequency: 2402MHz to 2480MHz Modulation Type: GFSK Number of Channels: 27 Antenna Type: PCB Antenna Antenna Gain: 1.6dBi (Provided by manufacturer) Channel List Table: channel number frequency channel number frequency 0 2402 14 2441 1 2414 15 2444 2 2415 16 2446 3 2416 17 2452 4 2417 18 2454 5 2419 19 2456 6 2421 20 2462 7 2426 21 2464 8 2428 22 2465 9 2429 23 2467 10 2430 24 2469 11 2431 25 2473 12 2433 26 2480 13 2439 4.2 Description of Support Units The EUT has been tested as an independ…

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SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 1 of 3 Appendix Photographs of Test Setup for SHCR2305000969AT Test Model No.: CST-3A SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 2 of 3 Test Setup Photo Radiated Spurious Emissions below 1GHz Radiated Spurious Emissions above 1GHz SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. Page: 3 of 3 The EUT Details of Zoom