2ASBG-YH8203GXMassage Chair

Model difference letter 2022.09.15 Dear MET Reviewer, This is a new Application from FUJIAN YIHE ELECTRONICS CO., LTD. Model No.: YH-8203GX,M1611E,M1611B,M1611,M1610 Use YH-8203GX for all tests.Only Same product, but different model. Thank you for your cooperation! Yours sincerely, Signatory: Name: YUAN RAO Position: SALES MANAGER Company Name: FUJIAN YIHE ELECTRONICS CO., LTD. Address: JIAN ROAD,QINXIYANG INDUSTRIAL PARK,FUAN,FUJIAN, 355000,China Tel / Fax 0086-15960807057/0086-593-6393883 E-Mail: [email protected]

FUJIAN YIHE ELECTRONICS CO., LTD. Agent Authorization Letter 2022-09-15 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen Most Technology Service Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Name: YUAN RAO Position: SALES MANAGER Company Name: FUJIAN YIHE ELECTRONICS CO., LTD. Address: JIAN ROAD,QINXIYANG INDUSTRIAL PARK,FUAN,FUJIAN, 355000,China Tel / Fax 0086-15960807057/0086-593-6393883 E-Mail: [email protected]

FUJIAN YIHE ELECTRONICS CO., LTD. Long Term Confidentiality Request Letter 2022-09-15 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR (FCC ID: 2ASBG-YH8203GX) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - e.g. Block diagram - e.g. SCH - e.g. Operational Description required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Name: YUAN RAO Position: SALES MANAGER Company Name: FUJIAN YIHE ELECTRONICS CO., LTD. Address: JIAN ROAD,QINXIYANG INDUSTRIAL PARK,FUAN,FUJIAN, 355000,China Tel / Fax 0086-15960807057/0086-593-6393883 E-Mail: [email protected]

Model No.: YH-8203GX FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: YH-8203GX LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: YH-8203GX TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE Model No.: YH-8203GX VIEW OF SAMPLE

Label Location

Model No.: YH-8203GX Page 1 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: YH-8203GX Page 2 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: YH-8203GX Page 3 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: YH-8203GX Page 4 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Antenna Location Model No.: YH-8203GX Page 5 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB

ANTENNASPECIFICATION Summary ITEMANTSPEC ModelName2.4GANT AntennaplatePCBantenna Center Frequency HorizontalVertical 2400MHz2450MHz2500MHz2400MHz2450MHz2500MHz -1.66-0.840-6.16-3.65-2.21 MAX.Gain0 PolarizationHorizontalandVertical Impedance50Ohm ManufactureSHENZHENSHIXINZHONGXINTECHNOLOGY.CO.,LTD AntennaPhoto&Length(mm) Horizontal:2400MHz2450MHz2500MHz Power(dBm) Max:0Min:-40Scale:5/div FrequencyGain(dBi) (MHz)Max.MinAvg. 2400-1.66179-30.2813-8.78713 2450-0.847811-38.7595-7.87812 2500-0.000000-23.6329-6.99139 Vertical:2400MHz2450MHz2500MHz Power(dBm) Max:0Min:-30Scale:5/div FrequencyGain(dBi) (MHz)Max.MinAvg. 2400-6.1623-23.1425-12.5295 2450-3.6534-26.2866-10.6699 2500-2.21101-29.4381-9.58526

CL=9pF,10ppm QFN40_5X5 BK3266主芯片 F-6988 COMPANY: C-CHIP TECH. BUYER NAME: DRAWN NAME: DRAMN/DATE: CHECKED/DATE: RELEASED/DATE: REV:SHEET: V2.2 F-6988 V2.3 2018.05.04 ALL BUYER 1 of 1 FILE NO. DRA-PBT-RD-14 REVISION RECORD LTR ECO NO: APPROVED/DATE: V2.2 The First 谢三顺/2018.05.09 注意事项： A．关于无线蓝牙的使用环境，无线信号包括蓝牙应用都受周围环境的影响很大，如 B．由于蓝牙模块都要配套现有的系统，放置在外壳中。由于金属外壳对无线射频信 C．PCB 布板：蓝牙模块的天线部分的是 PCB 天线，由于金属会削弱天线的功能，在 D. 模块应用过程中，请注意避免功放、升压线路等干扰源对模块的影响，避免模块供 树木、金属等障碍物会对无线信号有一定的吸收，从而在实际应用中，数据传输的距 离受一定的影响。 号是有屏蔽作用的。所以建议不要安装在金属外壳中。 给模块布板的时候，模块天线下面严禁铺地和走线，若能挖空更好。 电回路同大功率电路单元形成串联回路，以此来提高整机 SNR C13 4.7uF C12 4.7uF C10 1uF C2 NC C4 1uF L1 NC C14 1uF ANT X1 26MHz C8 1pF L5 4.7uH L2 1pF C24 2.2uF L4 4.7uH 1 GPIO2 2 GPIO14 3 GPIO13 4 RF 5 GPIO10 6 GPIO0/TXD 7 GPIO1/RXD 8 GPIO9 9 GPIO4 10 GPIO5 11 GPIO8 12 GPIO15 13 GPIO3 14 GPIO11 15 GPIO12 16 VDDDIG 17 SWD 18 GND 19 SWA 20 VDDANA 21 VBAT 22 VCC3SYS 23 VCC5USB 24 VDDALON 25 VDDIO3VFLA 26 AUDRP 27 AUDRN 28 AUDLN 29 AUDLP 30 VCOM 31 MICREF 32 MICRN 33 MICRP 34 LINEL 35 LINER 36 USBDN 37 USBDP 38 VDDBT 39 XO 40 XI 41 EPAD U2 BK3266_QFN40 C23 2.2uF C7 1.8nH/BPF C1 NC C16 1uF C15 4.7UF C5 2.2UF C6 NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1718192021222324 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 VBAT XI GPIO10A XO LIN_L AUDIOLP GPIO13_SDOA V2MICB1AS AUDIORP VDDALON LIN_R AUDIORN AUDIOLN GPIO13_SDOA MICINNMICINP RFP1 GPIO12_CMDAGPIO11_CLKA VDDIO3VFLA USB_DN GPIO9A RXD USB_DP TXD VCC3SYS GPIO14A GPIO2A GPIO3AGPIO15AGPIO8A RFP1VCC3IO VCC3YS VBAT VUSB AUDIORN AUDIORP AUDIOLP AUDIOLN V2MICB1AS MICINP MICINN LIN_L LIN_R GPIO3 USB_DN USB_DP GPIO11_CLKGPIO13_SDO GPIO12_CMD GPIO10 GPIO9 GPIO4 GPIO5 TXD RXD USB_DN USB_DP GPIO8 GPIO15 GPIO2 RFP1 GPIO14 AGND

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. RF Exposure Evaluation Report Report Reference No. ..................... : FCC ID.. .......................................... : MTWG2206116-H 2ASBG-YH8203GX Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : July 25,2022 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : FUJIAN YIHE ELECTRONICS CO., LTD Address ............................................ : JI’AN ROAD, QINXIYANG INDUSTRIAL PARK, FUAN, FUJIAN, 355000 CHINA Test specification/ Standard ..........: 47 CFR Part 1.1307 47 CFR Part 1.1310 KDB447498D01 General RF Exposure Guidance v06 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service 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 ..................... : Massage Chair Trade Mark ....................................... : Mynta Manufacturer .................................... : FUJIAN YIHE ELECTRONICS CO., LTD Model/Type reference....................... : YH-8203GX Listed Models .................................. : M1611E,M1611B,M1611,M1610 Modulation Type ............................... : GFSK, π/4DQPSK, 8DPSK Operation Frequency ........................ : 2402MHz to 2480MHz Hardware Version .............................. V1.1 Software Version ............................... V1.0 Rating ............................................... : 85-130V,50-60Hz,5A,150W Result................................................ : PASS Report No.: MTWG2206116-H Page 2 of 7 T E S T R E P O R T Equipment under Test : Massage Chair Model /Type : YH-8203GX Listed Models : M1611E,M1611B, M1611,M1610 Remark Same product, but different model. Applicant : FUJIAN YIHE ELECTRONICS CO., LTD Address : JI’AN ROAD, QINXIYANG INDUSTRIAL PARK, FUAN, FUJIAN, 355000 CHINA Manufacturer : FUJIAN YIHE ELECTRONICS CO., LTD Address : JI’AN ROAD, QINXIYANG INDUSTRIAL PARK, FUAN, FUJIAN, 355000 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.: MTWG2206116-H Page 3 of 7 1. Revision History Revision Issue Date Revisions Revised By 00 2022-07-25 Initial Issue Alisa Luo Report No.: MTWG2206116-H Page 4 of 7 2. SAR Evaluation 2.1 RF Exposure Compliance Requirement 2.1.1 Standard Requirement According to KDB447498D01 General RF Exposure Guidance v06 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 Exclusion Threshold condition, listed below, is satisfied. 2.1.2 Limits According to FCC Part1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in part1.1307(b) F= Frequency in MHz Friis Formula Friis transmission formula: Pd = (Pout*G)/(4* Pi * R 2) Where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Report No.: MTWG2206116-H Page 5 of 7 2.1.3 EUT RF Exposure Antenna Gain: -0.5dBi Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.4 in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: BLE GFSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402 MHz) 5.845 5.845±1 6.845 Middle(2440MHz) 7.007 7.007±1 8.007 Highest(2480MHz) 6.426 6.426±1 7.426 BLE Worst case: GFSK Channel Maximum Peak Conducted Output Power (dBm) Maximum Peak Conducted Output Power (MW) Antenna Gain (dBi) Power Density at R = 20 cm (mW/cm2) Limit Result Highest(2480 MHz) 8.007 6.32 0 0.0012 1.0 Pass Note: 1) Refer to report MTWG2206116-R2 for EUT test Max Conducted average Output Power value. Note: 2) Pd = (Pout*G)/(4* Pi * R2)=(6.32*1)/(4*3.1416*20 2 )=0.0012 Note: 3 )EUT's Bluetooth module is more than 20cm away from the human body. Report No.: MTWG2206116-H Page 6 of 7 EDR GFSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402 MHz) -0.398 -0.398±1 0.602 Middle(2441MHz) 0.817 0.817±1 1.817 Highest(2480MHz) 2.092 2.092±1 3.092 π/4DQPSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402 MHz) -0.431 -0.431±1 0.569 Middle(2441MHz) 0.773 0.773±1 1.773 Highest(2480MHz) 2.033 2.033±1 3.033 8DPSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402 MHz) -0.380 -0.380±1 …

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

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. TEST REPORT FCC Rules Part 15.247 Report Reference No. ..................... : FCC ID.. .......................................... : MTWG2206116-R2 2ASBG-YH8203GX Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : July 25,2022 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : FUJIAN YIHE ELECTRONICS CO., LTD Address ............................................ : JI’AN ROAD, QINXIYANG INDUSTRIAL PARK, FUAN, FUJIAN, 355000 CHINA Test specification/ Standard ..........: FCC Rules Part 15.247 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service 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 ..................... : Massage Chair Trade Mark ....................................... : Mynta Manufacturer .................................... : FUJIAN YIHE ELECTRONICS CO., LTD Model/Type reference....................... : YH-8203GX Listed Models .................................. : M1611E,M1611B, M1611, M1610 Modulation Type ............................... : GFSK Operation Frequency ........................ : From 2402MHz to 2480MHz Hardware Version .............................. V1.1 Software Version ............................... V1.0 Rating ............................................... : 85-130V,50-60Hz,5A Result................................................ : PASS Report No.: MTWG22060470-R2 Page 2 of 34 T E S T R E P O R T Equipment under Test : Massage Chair Model /Type : YH-8203GX Listed Models : M1611E,M1611B,M1611,M1610 Remark Same product, but different model. Applicant : FUJIAN YIHE ELECTRONICS CO., LTD Address : JI’AN ROAD, QINXIYANG INDUSTRIAL PARK, FUAN, FUJIAN, 355000 CHINA Manufacturer : FUJIAN YIHE ELECTRONICS CO., LTD Address : JI’AN ROAD, QINXIYANG INDUSTRIAL PARK, FUAN, FUJIAN, 355000 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.: MTWG22060470-R2 Page 3 of 34 Contents 1. REVISION HISTORY ................................................................ 4 2. TEST STANDARDS .................................................................. 5 3. SUMMARY ............................................................................. 6 3.1. General Remarks 6 3.2. Product Description 6 3.3. Equipment Under Test 6 3.4. Short description of the Equipment under Test (EUT) 6 3.5. EUT operation mode 7 3.6. Block Diagram of Test Setup 7 3.7. Test Item (Equipment Under Test) Description* 7 3.8. Auxiliary Equipment (AE) Description 7 3.9 Antenna Information* 8 3.10. EUT configuration 8 3.11. Modifications 8 4. TEST ENVIRONMENT ............................................................... 9 4.1. Address of the test laboratory 9 4.2. Environmental conditions 9 4.3. Test Description 10 4.4. Statement of the measurement uncertainty 10 4.5. Equipments Used during the Test 11 5. TEST CONDITIONS AND RESULTS ............................................ 12 5.1. AC Power Conducted Emission ................................................................................... 12 5.2. Radiated Emission ........................................................................................................ 15 5.3. Maximum Peak Output Power ...................................................................................... 22 5.4. Power Spectral Density ................................................................................................ 23 5.5. 6dB Bandwidth and 99% Bandwidth ............................................................................ 25 5.6. Band Edge Compliance of RF Emission ...................................................................... 27 5.7. Spurious RF Conducted Emission ............................................................................... 29 5.8. Antenna Requirement ................................................................................................... 32 6. TEST SETUP PHOTOS OF THE EUT .......................................... 33 7. EXTERNAL AND INTERNAL PHOTOS OF THE EUT ....................... 34 Report No.: MTWG22060470-R2 Page 4 of 34 1. Revision History Revision Issue Date Revisions Revised By 00 2022-07-25 Initial Issue Alisa Luo Report No.: MTWG22060470-R2 Page 5 of 34 2. TEST STANDARDS The tests were performed according to following standards: 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.: MTWG22060470-R2 Page 6 of 34 3. SUMMARY 3.1. General Remarks Date of receipt of test sample : 2022.06.30 Testing commenced on : 2022.07.01 Testing concluded on : 2022.07.08 3.2. Product Description Product Name: M…

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

Model No.: YH-8203GX RE TEST SETUP Model No.: YH-8203GX CE TEST SETUP