2BA5L-C6Bone Conduction Headphone

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: UGK-LVMUNITEDINC FRN: 0033476375 Contact Name: Jimmychen Address: 6547NAcademyBlvd#2266,ColoradoSprings,CO80918 Telephone No: 001-323-51 04660 Email: [email protected] Applicant: Company name: zheng zhou kuo ji shang mao you xian gong si Grantee code: 2BA5L FCC ID: 2BA5L-C6 Contact Name: Wang tao Address: 1hao lou er dan yuan 12ceng 15hao pu luo wang shi di zhong hai guang chang guo ji lu 168 hao zheng zhou shi jin shui qu Telephone No: 15243572522 Email: [email protected] [zheng zhou kuo ji shang mao you xian gong si] certifies that, as of the date of this filing of the application with the TCB, [UGK-LVMUNITEDINC] is our designated US agent for service of process for the above referenced FCC ID. [zheng zhou kuo ji shang mao you xian gong si] 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. [UGK-LVMUNITEDINC] 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: 2023/05/09 Applicant’s Name: Wang tao US Agent’s Name: Jimmychen Title: Manager Title: Manager Signature Signature

C5266091_X24_Ed.1 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: zheng zhou kuo ji shang mao you xian gong si Grantee code: 2BA5L FCC ID: 2BA5L-C6 Contact Name: Wang tao Address: 1hao lou er dan yuan 12ceng 15hao pu luo wang shi di zhong hai guang chang guo ji lu 168 hao zheng zhou shi jin shui qu Telephone No: 15243572522 Email: [email protected] i. [zheng zhou kuo ji shang mao you xian gong si] (“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. [zheng zhou kuo ji shang mao you xian gong si] (“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. The applicant must sign this certification. Date: 2023/05/09 Applicant’s Name: Wang tao Title: Manager 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

zheng zhou kuo ji shang mao you xian gong si 1/1 Letter of Authorization Company: zheng zhou kuo ji shang mao you xian gong si Address: 1hao lou er dan yuan 12ceng 15hao pu luo wang shi di zhong hai guang chang guo ji lu 168 hao zheng zhou shi jin shui qu Product Name: Bone Conduction Headphone Model Number: C6 FCC Identifier: 2BA5L-C6 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: Wang tao Date: 2023-05-09 Title: Manager Signature of applicant:

zheng zhou kuo ji shang mao you xian gong si 1/1 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2023-05-09 Subject: Request for Confidentiality FCC ID: 2BA5L-C6 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 No ☐ Internal Photos No ☐ 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. 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. Sincerely, Signature: Name: Wang tao Title: Manager

Size:16*12mm M/N: C6 FCC ID: 2BA5L-C6 Label location

ANT

FCC ID: 2BA5L-C6 RF Exposure Evaluation According to KDB 447498 D01 V06 and part 2.1093，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(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 EIRP=E Meas +20log(d Meas )-104.7 EIRP is the equivalent isotropically radiated power, in dBm E Meas is the field strength of the emission at the measurement distance, in dBμV/m d Meas is the measurement distance, in m Here, For EDR Field strength (dBuV/m) EIRP (dBm) Max tune-up (mW) Frequency (MHz) Min. distance(mm) Calc. thresholds limit 84.61 -10.55 0.088 2402 5 0.027 3.0 So a SAR test is not required

深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT REV. NO. A PAGE 1 OF 8 FH 3216 D1 R 2445 01 12 3 45 3.2 x 1.6 x 0.5(mm) WiFi/Bluetooth Ceramic Chip Antenna (FH100G) Engineering Specification 1.Product Number 1 2 3 4 5 FH3216D1R244501 深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT FH3216D1R244501 REV. NO. A PAGE 2 OF 8 2.Features *Stable and reliable in performances *Low temperature coefficient of frequency *Low profile, compact size *RoHS compliance *SMT processes compatible 3.Applications *Bluetooth earphone systems *Hand-held devices when WiFi /Bluetooth functions are needed, e.g., Smart phone. *IEEE802.11 b/g/n *ZigBee *Wireless PCMCIA cards or USB dongle 4.Description Fu hui chip antenna series are specially designed for WiFi/Bluetooth applications. Based on yingfeng proprietary design and processes, this chip antenna has excellent stability and sensitivity to consistently provide high signal reception efficiency. 5.Electrical Specifications (40 x 40 mm 2 ground plane) 5-1. Electrical Table Characteristics Specifications Unit Outline Dimensions 3.2x1.6x0.5 mm Working Frequency 2400~2500 MHz VSWR 2 Max. Impedance 50  Polarization Linear Polarization Gain Peak 1.20 (typical) dBi Efficiency 72 (typical) % 5-2. Return Loss & VSWR Chip Antenna _ Radiation X Y Z 深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT FH3216D1R244501 REV. NO. A PAGE 4 OF 8 深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT FH3216D1R244501 REV. NO. A PAGE 5 OF 8 7.Radiation Pattern (40x 40 mm 2 ground plane) 7-1. 3D Gain Pattern @ 2450 MHz Z X Y Y X Z 深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT FH3216D1R244501 REV. NO. A PAGE 6 OF 8 深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT FH3216D1R244501 REV. NO. A PAGE 7 OF 8 深圳福汇科技有限公司 Shenzhen Fuhui Technology Co.Ltc Prepared by : harry Designed by : andy Checked by : andy Approved by：oliver TITLE：3.2x1.6 x 0.5mm) WiFi/Bluetooth Ceramic Chip Antenna (YF400B) Engineering Specification DOCUMENT FH3216D1R244501 REV. NO. A PAGE 8 OF 8

Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 41 FCC Part 15C Test Report FCC ID: 2BA5L-C6 Applicant: zheng zhou kuo ji shang mao you xian gong si Address: 1hao lou er dan yuan 12ceng 15hao pu luo wang shi di zhong hai guang chang guo ji lu 168 hao zheng zhou shi jin shui qu Manufacturer: Shenzhen RDT Digital Technology Co.,LTD. Address: NO.98 Chenfeng Building, Xin'gang Rd, Chan'gan Town, Dongguan, China EUT: Bone Conduction Headphone Trade Mark: N/A Model Number: C6 Date of Receipt: Apr. 26, 2023 Test Date: Apr. 26, 2023 - May. 05, 2023 Date of Report: May. 05, 2023 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Building C, Shuanghuan, No.8, Baoqing Road, Baolong Industrial Zone, Baolong Street, Longgang District, Shenzhen, Guangdong, China Applicable Standards: FCC PART 15 C 15.249 ANSI C63.10:2013 Test Result: Pass Report Number: DL-2023050501E Prepared (Test Engineer): Pxing Huang Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 41 Table of Contents Page 1 . SUMMARY OF TEST RESULTS 4 1.1 MEASUREMENT UNCERTAINTY 4 2 . GENERAL INFORMATION 5 2.1 GENERAL DESCRIPTION OF EUT 5 2.2 DESCRIPTION OF TEST MODES 7 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 7 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 8 2.5 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 8 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS 9 3 . EMC EMISSION TEST 10 3.1 CONDUCTED EMISSION MEASUREMENT 10 3.1.1 POWER LINE CONDUCTED EMISSION LIMITS 10 3.1.2 TEST PROCEDURE 10 3.1.3 DEVIATION FROM TEST STANDARD 10 3.1.4 TEST SETUP 11 3.1.5 EUT OPERATING CONDITIONS 11 3.1.6 TEST RESULTS 11 3.2 RADIATED EMISSION MEASUREMENT 14 3.2.1 RADIATED EMISSION LIMITS 14 3.2.2 TEST PROCEDURE 15 3.2.3 DEVIATION FROM TEST STANDARD 15 3.2.4 TEST SETUP 15 3.2.5 EUT OPERATING CONDITIONS 16 3.2.6 TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) 17 3.2.7 TEST RESULTS (BETWEEN 30MHZ – 1GHZ) 18 3.2.8 TEST RESULTS (1GHZ~25GHZ) 20 3.3 RADIATED BAND EMISSION MEASUREMENT 23 3.3.1 TEST REQUIREMENT: 23 3.3.2 TEST PROCEDURE 23 3.3.3 DEVIATION FROM TEST STANDARD 23 3.3.4 TEST SETUP 24 3.3.5 EUT OPERATING CONDITIONS 24 4 . BANDWIDTH TEST 28 4.1 APPLIED PROCEDURES / LIMIT 28 4.1.1 TEST PROCEDURE 28 4.1.2 DEVIATION FROM STANDARD 28 4.1.3 TEST SETUP 28 4.1.4 EUT OPERATION CONDITIONS 28 Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 41 Table of Contents Page 4.1.5 TEST RESULTS 29 5 . ANTENNA REQUIREMENT 32 5.1 STANDARD REQUIREMENT 32 5.2 EUT ANTENNA 32 6 . TEST SEUUP PHOTO 33 7 . EUT PHOTO 35 Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 41 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.249) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.205(a), 15.209(a) 15.249(a), 15.249(c) Fundamental &Radiated Spurious Emission Measurement PASS 15.249(d) Band Edge Emission PASS 15.215(c) 20dB Bandwidth PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report 1.1 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2,providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% 8 20dB Bandwidth ±0.2MHz Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 41 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Product Name: Bone Conduction Headphone Trademark N/A Model No.: C6 Model Difference N/A Operation Frequency: 2402~2480MHz Channel numbers: 79 Channels Channel separation: 1M Modulation technology: GFSK, PI/4 DQPSK, 8DPSK Antenna Type: Chip antenna Antenna gain: 1.20dBi Power supply: DC 3.7V from battery DC 5V from charger Note: 1.For a more detailed features description, please refer to the manufacturer’s specifications or the User's Manual. 2.The EUT’s all information provided by client. Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 6 of 41 3. Channel List Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 00 2402 27 2429 54 2456 01 2403 28 2430 55 2457 02 2404 29 2431 56 2458 03 2405 30 2432 57 2459 04 2406 31 2433 58 2460 05 2407 32 2434 59 2461 06 2408 33 2435 60 2462 07 2409 34 2436 61 2463 08 2410 35 2437 62 2464 09 2411 36 2438 63 2465 10 2412 37 2439 64 2466 11 2413 38 2440 65 2467 12 2414 39 2441 66 2468 13 2415 40 2442 67 2469 14 2416 41 2443 68 2470 15 2417 42 2444 69 2471 16 2418 43 2445 70 2472 17 2419 44 2446 71 2473 18 2420 45 2447 72 2474 19 2421 46 2448 73 2475 20 2422 47 2449 74 2476 21 2423 48 2450 75 2477 22 2424 49 2451 76 2478 23 2425 50 2452 77 2479 24 2426 51 2453 78 2480 25 2427 52 2454 26 2428 53 2455 Shenzhen DL Testing Technology Co., Ltd. Report No.: DL-20230505041E Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 7 of 41 2.2 DESCRIPTION OF TEST MODES Note: (1) The measurements are performed at the h…

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

Radiated Measurement Photos Conducted Measurement Photos