2A59C-M486Belt Drive Turntable System

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: GSS SERVICE INC FRN: 0033402082 Contact Name: Michoux Logan Address: 6547 N Academy Blvd #2266 Colorado Springs COLORADO 80918 United States Telephone 001-949-2990192 Email: [email protected] Applicant: Company name: Guangzhou H & F Electronics Technology Co., Ltd. Product Description: Belt Drive Turntable System Grantee code: 2A59C FCC ID: 2A59C-M486 FRN: 0032217382 Contact Name: David Xi Address: Room 101, Building 5, No.481 Tainan Road, Nansha District, Guangzhou Guangdong, China Telephone No: 020-39011029 Email: [email protected] [Guangzhou H & F Electronics Technology Co., Ltd.] certifies that, as of the date of this filing of the application with the TCB, [GSS SERVICE INC] is our designated US agent for service of process for the above referenced FCC ID. [Guangzhou H & F Electronics Technology Co., Ltd.] 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 equipment. [GSS SERVICE INC] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2023/12/19 Applicant’s Name: David Xi US Agent’s Name: Michoux Logan Title: sales Title: PM Signature Signature

C5266091_X24_Ed.2 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Guangzhou H & F Electronics Technology Co., Ltd. Grantee code: 2A59C FCC ID: 2A59C-M486 Contact Name: David Xi Address: Room 101, Building 5, No.481 Tainan Road, Nansha District, Guangzhou Guangdong, China Telephone No: 020-39011029 Fax No: 020-39011029 Email: [email protected] i. [Guangzhou H & F Electronics Technology 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. The applicant must sign this certification. ii. [Guangzhou H & F Electronics Technology Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. [Guangzhou H & F Electronics Technology Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of theapplication, the applicant [is not] identified on the Covered List as an entity producing “covered” equipment . Date: 2023/12/19 Applicant’s Name: David Xi Title: sales Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Guangzhou H & F Electronics Technology Co., Ltd. Product Similarity Declaration Product name: Belt Drive Turntable System Model name: M486, B10A, M506 FCC ID: 2A59C-M486 We (Guangzhou H & F Electronics Technology Co., Ltd.) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), the only difference is the model name. Signature: Name: David Xi Title: sales Place, date: 2023/12/19

C5266091_X8_Ed.1 1/1 Letter of Authorization < Guangzhou H & F Electronics Technology Co., Ltd.> Company: Guangzhou H & F Electronics Technology Co., Ltd. Address: Room 101, Building 5, No.481 Tainan Road, Nansha District, Guangzhou Guangdong, China Product Name: Belt Drive Turntable System Model Number: M486, B10A, M506 FCC Identifier: 2A59C-M486 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: David Xi Date: 2023/12/19 Title: sales Signature of applicant:

C5266091_X10_Ed.2 1/1 < Guangzhou H & F Electronics Technology Co., Ltd.> Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2023/12/19 Subject: Request for Confidentiality FCC ID: 2A59C-M486 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. 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 NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name: David Xi Title: sales

FCC ID: 2A59C-M486 External Photos of the EUT Photo 1 Photo 2 Photo 3 FCC ID: 2A59C-M486 Photo 4 Photo 5 Photo 6 FCC ID: 2A59C-M486 Photo 7

Label and Location Size: L: 3.0cm*W: 2.0cm Label and Location Model No.: M486 FCC ID : 2A59C-M486

FCC ID: 2A59C-M486 Internal Photos of the EUT Photo 1 Photo 2 Photo 3 BT PCB Antenna FCC ID: 2A59C-M486 Photo 4 Photo 5 Photo 6 FCC ID: 2A59C-M486 Photo 7 Photo 8 Photo 9 FCC ID: 2A59C-M486 Photo 10 Photo 11 Photo 12

RF Exposure evaluation FCC ID: 2A59C-M486 1.1. Applicable Standard According to §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 §1.1310 and §2.1093 RF exposure requirement KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 1.2. Requirement According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The 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 (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(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 • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 5) in section 4.1 is applied to determine SAR test exclusion. 1.3. Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 2 of 2 2. E v a l u a t i o n R e s u l t Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power (including tune-up tolerance) SAR Test Exclusion Threshold SAR Test Exclusion dBm mW BT 2.441 5 1.0 1.26 0.3937<3.0 Yes 3. C o n c l u s i o n The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06 .....................End of Report.........................

1. Antenna Description: Antenna type PCB antenna Model M486 Frequency range 2400-2500MHz Manufacturer Guangzhou H & F Electronics Technology Co., Ltd. ANT Peak Gain 1.58 dBi 2. Antenna Photo: Length: 14.24mm Width: 3.27mm 3. Test Equipment & Conditions 3.1 Test instrument VSWR is tested using Agilent E5071B connected to a hand mechanism, and the status is free space. 3.2 Test environment and methods 4．Antenna Radiation Pattern 2400MHz 2450MHz 2500MHz

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. .................... : FCC ID. ........................................... : CTA23111601201 2A59C-M486 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Amy Wen Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Nov. 21, 2023 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ........................... : Guangzhou H & F Electronics Technology Co., Ltd. Address ............................................ : Room 101, Building 5, No.481 Tainan Road, Nansha District, Guangzhou Guangdong, China Test specification ........................... : Standard ........................................... : FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Belt Drive Turntable System Trade Mark ....................................... : N/A Manufacturer .................................... : Guangzhou H & F Electronics Technology Co., Ltd. Model/Type reference ...................... : M486 Listed Models .................................. : B10A, M506 Modulation ....................................... : GFSK, Π/4DQPSK Frequency ......................................... From 2402MHz to 2480MHz Rating ............................................... : DC 15.0V From external circuit Result ............................................... : PASS Report No.: CTA23111601201 Page 2 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Belt Drive Turntable System Model /Type : M486 Listed Models : B10A, M506 Applicant : Guangzhou H & F Electronics Technology Co., Ltd. Address : Room 101, Building 5, No.481 Tainan Road, Nansha District, Guangzhou Guangdong, China Manufacturer : Guangzhou H & F Electronics Technology Co., Ltd. Address : Room 101, Building 5, No.481 Tainan Road, Nansha District, Guangzhou Guangdong, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA23111601201 Page 3 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 T E S T S T A N D A R D S .................................................................. 4 2 S U M M A R Y ............................................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT operation mode 5 2.6 Block Diagram of Test Setup 6 2.7 Related Submittal(s) / Grant (s) 6 2.8 Modifications 6 3 T E S T E N V I R O N M E N T ............................................................... 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Environmental conditions 7 3.4 Summary of measurement results 8 3.5 Statement of the measurement uncertainty 8 3.6 Equipments Used during the Test 9 4 T E S T C O N D I T I O N S A N D R E S U L T S ............................................ 11 4.1 AC Power Conducted Emission 11 4.2 Radiated Emission 14 4.3 Maximum Peak Output Power 20 4.4 20dB Bandwidth 21 4.5 Frequency Separation 24 4.6 Number of hopping frequency 26 4.7 Time of Occupancy (Dwell Time) 28 4.8 Out-of-band Emissions 31 4.9 Antenna Requirement 38 5 T E S T S E T U P P H O T O S O F T H E E U T .......................................... 39 6 P H O T O S O F T H E E U T ............................................................. 40 Report No.: CTA23111601201 Page 4 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz. ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices Report No.: CTA23111601201 Page 5 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 2 S U M M A R Y 2.1 General Remarks Date of receipt of t…

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Report No.: CTA23111601201 Page 31 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 4.8 Out-of-band Emissions Limit In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF con-ducted or a radiated measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter com-plies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. Test Procedure Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing these setting are made of the in-band reference level, bandedge and out-of-band emissions. Test Configuration EUT SPECTRUM ANALYZER Test Results Remark: The measurement frequency range is from 30MHz to the 10th harmonic of the fundamental frequency. The lowest, middle and highest channels are tested to verify the spurious emissions and bandage measurement data. We measured all conditions (DH1, DH3, DH5) and recorded worst case at DH5 Test plot as follows: Report No.: CTA23111601201 Page 32 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn GFSK(CH00) GFSK(CH39) reference reference 30MHz-1G 30MHz-1G 1G-25G 1G-25G Report No.: CTA23111601201 Page 33 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn GFSK(CH78) π/4DQPSK (CH00) reference reference 30MHz-1G 30MHz-1G 1G-25G 1G-25G Report No.: CTA23111601201 Page 34 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn π/4DQPSK (CH39) π/4DQPSK (CH78) reference reference 30MHz-1G 30MHz-1G 1G-25G 1G-25G Report No.: CTA23111601201 Page 35 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Band-edge Measurements for RF Conducted Emissions: GFSK Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Report No.: CTA23111601201 Page 36 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn π/4DQPSK Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Report No.: CTA23111601201 Page 37 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Pseudorandom Frequency Hopping Sequence TEST APPLICABLE For 47 CFR Part 15C section 15.247 (a) (1) requirement: Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400–2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hop-ping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals. EUT Pseudorandom Frequency Hopping Sequence Requirement The pseudorandom frequency hopping sequence may be generated in a nice-stage shift register whose 5 th and 9 th stage outputs are added in a modulo-two addition stage. And the result is fed back to the input of the first stage. The sequence begins with the first one of 9 consecutive ones, for example: the shift register is initialized with nine ones. ● Number of shift register stages:9 ● Length of pseudo-random sequence:29-1=511 bits ● Longest sequence of zeros:8(non-inverted signal) An example of pseudorandom frequency hopping sequence as follows: Each frequency used equally one the average by each transmitter. The system receiver have input bandwidths that match the hopping channel bandwidths of their corresponding transmitter and shift frequencies in synchronization with the transmitted signals. Report No.: CTA23111601201 Page 38 of 46 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+8…

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FCC ID: 2A59C-M486 Test Setup Photos of the EUT