2AR2STAH4205Wireless on-ear headphones

Authority to Act as Agent [March 2, 2020] Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Subject: Limited Agency Agreement (MMD Hong Kong Holding Limited) FCC ID: (2AR2STAH4205) To Whom It May Concern: Shenzhen UnionTrust Quality and Technology Co., Ltd. is authorized to act on our behalf, until otherwise notified, for applications to Intertek Testing Services. We certify that we are not subject to 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. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you, Agency Agreement Expiration Date: 36 months By: __________________________ Tomas guan (Signature 1 ) (Print name) Title: Manager On behalf of: (MMD Hong Kong Holding Limited) Telephone: 86-755-36358722 1 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

1(1) [MMD Hong Kong Holding Limited] [March 2, 2020] Attention: Application Examiner RE: Request for Confidentiality Applicant: [MMD Hong Kong Holding Limited] FCC ID: [2AR2STAH4205] To Whom It May Concern: Permanent Confidentiality [Complete this section if permanent confidentiality is requested] Request is hereby submitted by [MMD Hong Kong Holding Limited] 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:  Schematics  Detailed Block Diagrams  Detailed Operational/Functional Description Rationale for request for confidentiality: [MMD Hong Kong Holding Limited] 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significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us.] [Short term confidentiality: Disclosure of the short-term confidential portions of this application during the period of importation and/or distribution would reveal key aspects of proprietary technology to competitors and diminish the value of our investment in research and development.] If you have questions or need further information, please contact the undersigned. Sincerely, [Signature] [Tomas guan] [ Manager] [MMD Hong Kong Holding Limited]

Page 1 of 1 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 2 PHOTOS OF EUT CONSTRUCTIONAL DETAILS EUT EXTERNAL PHOTOS EUT Photo EUT Photo

SN编码原则： LE-我司代码 P-代表Philips A -变更码 19-年 15 -周 0-第1位数字，从0开始 00001 -为流水号 LEPA1915000001 L R TAH4205BK/00 TAH4205WT/00 TAH4205RD/00 TAH4205BL/00 L TAH4205_00 Approbation label stickerR Model No:TAH4205 Refer no.:TAH4205BK/00 CAN ICES-3(B)/NMB-3(B) IC: 24589-TAH4205 FCC ID: 2AR2STAH4205 DC Input: 5V 0.5A Model No:TAH4205 Refer no.:TAH4205WT/00 CAN ICES-3(B)/NMB-3(B) IC: 24589-TAH4205 FCC ID: 2AR2STAH4205 DC Input: 5V 0.5A Model No:TAH4205 Refer no.:TAH4205RD/00 CAN ICES-3(B)/NMB-3(B) IC: 24589-TAH4205 FCC ID: 2AR2STAH4205 DC Input: 5V 0.5A Model No:TAH4205 Refer no.:TAH4205BL/00 CAN ICES-3(B)/NMB-3(B) IC: 24589-TAH4205 FCC ID: 2AR2STAH4205 DC Input: 5V 0.5A SIZE:30x10mm Material 25#() (white) COATING: Matt PP Printed Black SN Model No:TAH4205 Refer no.:TAH4205BK/00CAN ICES-3(B)/NMB-3(B) IC:24589-TAH4205FCC ID:2ARSTAH4205 DC Input: 5V 0.5A

Page 1 of 6 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 2 PHOTOS OF EUT CONSTRUCTIONAL DETAILS EUT INTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 6 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 3 of 6 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Antenna Module IC Page 4 of 6 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 5 of 6 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 6 of 6 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo

RF Exposure Requirements Product Description: Wireless on-ear headphones Model No.: TAH4205 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 According to the KDB 447498 D01 V06 and RSS-102 Issue 5, the following RF exposure evaluation shall to demonstrate RF exposure compliance. Bluetooth BR & EDR Frequency Range: 2402 MHz to 2480 MHz Type of Modulation: GFSK, π/4DQPSK, 8DPSK Device category: Portable device (Distance: 5mm) The maximum conducted output power tested: 2.39dBm The conducted output power specified is 1 dBm Tolerance: ±2 dB  FCC RF exposure The source- based time-averaging conducted output power = (2.39 + 2) * Duty cycle mW = 2.748 mW (Duty Cycle ≤ 100%) Maximum Conducted Output Power: 2.748 mW Limit: 10mW Source-based time-averaged Conducted output power is2.748 mW < 10mW  ISED RF exposure The source- based time-averaging conducted output power = (2.39 + 2) * Duty cycle mW = 2.748 mW (Duty Cycle ≤ 100%) Maximum Conducted Output Power: 2.748 mW Limit: 4mW Source-based time-averaged Conducted output power is 2.748 mW < 4mW So the transmitter complies with the RF exposure requirements and the SAR is not required.

Page 2 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 Version Version No. Date Description V1.0 March 4, 2020 Original Page 3 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 CONTENTS 1. GENERAL INFORMATION ....................................................................................................................................... 4 1.1 CLIENT INFORMATION ........................................................................................................................................ 4 1.2 EUT INFORMATION ............................................................................................................................................ 4 1.2.1 GENERAL DESCRIPTION OF EUT ............................................................................................................ 4 1.2.2 DESCRIPTION OF ACCESSORIES .............................................................................................................. 4 1.3 PRODUCT SPECIFICATION SUBJECTIVE TO THIS STANDARD ................................................................................. 4 1.4 OTHER INFORMATION ......................................................................................................................................... 5 1.5 DESCRIPTION OF SUPPORT UNITS ...................................................................................................................... 5 1.6 TEST LOCATION ................................................................................................................................................. 6 1.7 TEST FACILITY ................................................................................................................................................... 6 1.8 DEVIATION FROM STANDARDS ............................................................................................................................ 6 1.9 ABNORMALITIES FROM STANDARD CONDITIONS .................................................................................................. 6 1.10 OTHER INFORMATION REQUESTED BY THE CUSTOMER ........................................................................................ 6 1.11 MEASUREMENT UNCERTAINTY ........................................................................................................................... 7 2. TEST SUMMARY ...................................................................................................................................................... 7 3. EQUIPMENT LIST .................................................................................................................................................... 8 4. TEST CONFIGURATION .......................................................................................................................................... 9 4.1 ENVIRONMENTAL CONDITIONS FOR TESTING ........................................................................................................ 9 4.1.1 NORMAL OR EXTREME TEST CONDITIONS ............................................................................................... 9 4.1.2 RECORD OF NORMAL ENVIRONMENT....................................................................................................... 9 4.2 TEST CHANNELS ............................................................................................................................................... 9 4.3 EUT TEST STATUS ............................................................................................................................................ 9 4.4 PRE-SCAN .................................................................................................................................................... 10 4.5 TEST SETUP .................................................................................................................................................... 11 4.5.1 FOR RADIATED EMISSIONS TEST SETUP ................................................................................................ 11 4.5.2 FOR CONDUCTED EMISSIONS TEST SETUP ............................................................................................ 12 4.5.3 FOR CONDUCTED RF TEST SETUP ........................................................................................................ 13 4.6 SYSTEM TEST CONFIGURATION ........................................................................................................................ 13 4.7 DUTY CYCLE ................................................................................................................................................... 14 5. RADIO TECHNICAL REQUIREMENTS SPECIFICATION .................................................................................... 15 5.1 REFERENCE DOCUMENTS FOR TESTING ............................................................................................................ 15 5.2 ANTENNA REQUIREMENT ................................................................................................................................. 15 5.3 CONDUCTED PEAK OUTPUT POWER ................................................................................................................. 16 5.4 20 DB BANDWIDTH & OCCUPIED BANDWIDTH ................................................................................................... 19 5.5 CARRIER FREQUENCIES SEPARATION .....…

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

Page 32 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 5.8 CONDUCTED OUT OF BAND EMISSION Test Requirement: FCC 47 CFR Part 15 Subpart C Section 15.247(d) RSS-247 Issue 2, Section 5.5 Test Method: ANSI C63.10-2013 Section 6.10.4 & Section 7.8.8 Limit: In any 100kHz bandwidth outside the frequency bands in which the spread spectrum intentional radiator in operating, the radio frequency power that is produced by the intentional radiator shall be at least 20dB below that in the 100kHz bandwidth within the band that contains the highest level of the desired power. Test Procedure: Remove the antenna from the EUT and then connect a low loss RF cable from the antenna port to the spectrum analyzer. Use the following spectrum analyzer settings: Step 1:Measurement Procedure REF a) Set instrument center frequency to 2400 MHz or 2483.5 MHz. b) Wide enough to capture the peak level of the emission operating on the channel closest to the band edge, as well as any modulation products that fall outside of the authorized band of operation. c) Set the RBW = 100 kHz. d) Set the VBW ≥ 3 x RBW. e) Detector = peak. f) Sweep time = auto couple. g) Sweep points ≥ 2 x Span/RBW h) Trace mode = max hold. i) Allow the trace to stabilize. j) Set the marker on the emission at the band edge, or on the highest modulation product outside of the band, if this level is greater than that at the band edge. Enable the marker-delta function, and then use the marker-to-peak function to move the marker to the peak of the in-band emission. Step 2:Measurement Procedure OOBE a) Set RBW = 100 kHz. b) Set VBW ≥ 300 kHz. c) Detector = peak. d) Sweep = auto couple. e) Trace Mode = max hold. f) Allow trace to fully stabilize. g) Use the peak marker function to determine the maximum amplitude level. Note: The cable loss and attenuator loss were offset into measure device as an amplitude offset. Test Setup: Refer to section 4.5.3 for details. Instruments Used: Refer to section 3 for details Test Mode: Hopping Frequencies Transmitter mode Test Results: Pass Test Data: Page 33 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 The test plots as follows: GFSK In-Band Reference Level Out of Band Emission Lowest Channel Middle Channel Highest Channel Page 34 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 π/4DQPSK In-Band Reference Level Out of Band Emission Lowest Channel Middle Channel Highest Channel Page 35 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 8DPSK In-Band Reference Level Out of Band Emission Lowest Channel Middle Channel Highest Channel Page 36 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 Hopping Lowest Channel Hopping Highest Channel GFSK π/4DQPSK 8DPSK Page 37 of 47 Report No.: 191203014RFC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-RF-RSS247-V1.0 5.9 RADIATED SPURIOUS EMISSIONS Test Requirement: FCC 47 CFR Part 15 Subpart C Section 15.205/15.209 RSS-Gen Issue 5, Section 6.13/8.9/8.10 Test Method: ANSI C63.10-2013 Section 6.3 & 6.5 & 6.6 Receiver Setup: Frequency RBW 0.009 MHz-0.150 MHz 200/300 kHz 0.150 MHz -30 MHz 9/10 kHz 30 MHz-1 GHz 100/120 kHz Above 1 GHz 1 MHz Limits: Spurious Emissions Frequency Field strength (microvolt/meter) Limit (dBμV/m ) Remark Measurement distance (m) 0.009 MHz-0.490 MHz 2400/F(kHz) -- -- 300 0.490 MHz-1.705 MHz 24000/F(kHz) -- -- 30 1.705 MHz-30 MHz 30 -- -- 30 30 MHz-88 MHz 100 40.0 Quasi-peak 3 88 MHz-216 MHz 150 43.5 Quasi-peak 3 216 MHz-960 MHz 200 46.0 Quasi-peak 3 960MHz-1GHz 500 54.0 Quasi-peak 3 Above 1 GHz 500 54.0 Average 3 Remark: 1. The lower limit shall apply at the transition frequencies. 2. Emission level (dBuV/m) = 20 log Emission level (uV/m). 3. For frequencies above 1000 MHz, the field strength limits are based on average detector, however, the peak field strength of any emission shall not exceed the maximum permitted average limits, specified above by more than 20 dB under any condition of modulation. Test Setup: Refer to section 4.5.1 for details. Test Procedures: 1. From 30 MHz to 1GHz test procedure as below: 1) The EUT was placed on the top of a rotating table 0.8 meters above the ground at a 3 meter semi-anechoic camber. The table was rotated 360 degrees to determine the position of the highest radiation. 2) The EUT was set 3 meters away from the interference-receiving antenna, which was mounted on the top of a variable-height antenna tower. 3) The antenna he…

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

Page 1 of 2 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 1 PHOTOS OF TEST SETUP Radiated emission Test Setup (30 MHz~1 GHz) Radiated emission Test Setup (Above 1 GHz) Page 2 of 2 FCC ID: 2AR2STAH4205 IC: 24589-TAH4205 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com Conducted Emission Test Setup