2AUY3YT-WM20002.4G wireless receiver transmitter

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Yo-tronics Technology Co.,Ltd 4F, No.21, Alley 10, Lane 321, Xinmin Rd, Neihu District, Taipei, Taiwan. TEL: 886-2-27938901 FAX: 886-2-27938618 Series Models Description FCC ID:2AUY3YT-WM2000 Date: Feb. 25, 2021 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: The device (Product Name: 2.4G wireless receiver transmitter) Models Name: YT-WM2000 PRO, S YT-WM2000 XLR, YT-WM2000 C, YT-WM2000 D, YT-WM2000 E have same electrical, PCB and BOM, only the model’s name different for marketing requirements. Sincerely, Mike Chen / president

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Yo-tronics Technology Co.,Ltd Address: 4F, No.21, Alley 10, Lane 321, Xinmin Rd, Neihu District, Taipei, Taiwan Product Name: 2.4G wireless receiver transmitter Model Number: YT-WM2000 PRO, YT-WM2000 XLR, YT-WM2000 C, YT- WM2000 D, YT-WM2000 E FCC Identifier: 2AUY3YT-WM2000 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: Mike Chen Date: Feb. 25, 2021 Title: president Signature of applicant:

C5266091_X10_Ed.1 1/1 Yo-tronics Technology Co.,Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: Feb. 25, 2021 Subject: Request for Confidentiality FCC ID: 2AUY3YT-WM2000 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 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 Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No 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. C5266091_X10_Ed.1 1/1 Sincerely, Signature: Name: Mike Chen Title: president

FCC ID:2AUY3YT-WM2000

FCC ID Label Information 1. Label location: 2. FCC ID Label: FCC ID: 2AUY3YT-WM2000 FCCID Label Location

Antenna FCC ID:2AUY3YT-WM2000 AU0903B WM8758B RFX2401C NRF24L01+

RF Exposure evaluation According to 447498 D01 General RF Exposure Guidance v05 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 pt=(98.42-95.23)dBm =2.084mW at 2475MHz So (2.084mW/5mm)x √2.475GHz =0.66<3 Then SAR evaluation is not required

Shenzhen CTL Testing Technology Co., Ltd. Tel: +86-755-89486194 E-mail: [email protected] TEST REPORT FOR FCC PART 15 SUBPART C 15.249 Report Reference No. ................ : CTL2010121041-WF Compiled by: ( position+printed name+signature) Happy Guo (File administrators) Tested by: ( position+printed name+signature) Gray Gao (Test Engineer) Approved by: ( position+printed name+signature) Ivan Xie (Manager) Product Name ............................ : 2.4G wireless receiver transmitter Model/Type reference ................ : YT-WM2000 PRO List Model(s) ............................... : YT-WM2000 XLR, YT-WM2000 C, YT-WM2000 D, YT-WM2000 E Trade Mark .................................. : YOGA, Yo-tronics FCC ID ......................................... : 2AUY3YT-WM2000 Applicant’s name ....................... : Yo-tronics Technology Co.,Ltd Address of applicant ................. : 4F, No.21, Alley 10, Lane 321, Xinmin Rd, Neihu District, Taipei, Taiwan Test Firm ..................................... : Shenzhen CTL Testing Technology Co., Ltd. Address of Test Firm ................. : Floor 1-A, Baisha Technology Park, No.3011, Shahexi Road, Nanshan District, Shenzhen, China 518055 Test specification ....................... : Standard ...................................... : FCC Part 15.249:Operation within the bands 920-928 MHz, 2400-2483.5 MHz, 5725-5850 MHz and 24.0 - 24.25 GHz. TRF Originator ............................. : Shenzhen CTL Testing Technology Co., Ltd. Master TRF .................................. : Dated 2011-01 Date of receipt of test item ........ : Oct. 15, 2020 Date of sampling ........................ : Oct. 15, 2020 Date of Test Date ........................ : Oct. 15, 2020–Feb. 19, 2021 Date of Issue .............................. : Feb. 20, 2021 Result .......................................... : Pass Shenzhen CTL 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 CTL Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTL 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. V1.0 Page 2 of 25 Report No.: CTL2010121041-WF TEST REPORT Test Report No. : CTL2010121041-WF Feb. 20, 2021 Date of issue Equipment under Test : 2.4G wireless receiver transmitter Sample No. CTL201012104-1-S001 Model /Type : YT-WM2000 PRO Listed Models : YT-WM2000 XLR, YT-WM2000 C, YT-WM2000 D, YT-WM2000 E Applicant : Yo-tronics Technology Co.,Ltd Address : 4F, No.21, Alley 10, Lane 321, Xinmin Rd, Neihu District, Taipei, Taiwan Manufacturer : KADA INTERNATIONAL LIMITED Address : No.141, In Tai Road, In Tai Industrial Park, Da Lang Sub District, Long Hua New District, Shenzhen, Guangdong, China Test result Pass * * In the configuration tested, the EUT complied with the standards specified page 5. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the issuing testing laboratory. V1.0 Page 3 of 25 Report No.: CTL2010121041-WF ** Modified History ** Revision Description Issued Data Report No. Remark Version 1.0 Initial Test Report Release 2021-02-20 CTL2010121041-WF Tracy Qi V1.0 Page 4 of 25 Report No.: CTL2010121041-WF Table of Contents Page 1. SUMMARY ............................................................................................................................................................... 5 1.1. TEST STANDARDS ..................................................................................................................................................... 5 1.2. TEST DESCRIPTION ........................................................................................................................................................ 5 1.3. TEST FACILITY .............................................................................................................................................................. 6 1.4. STATEMENT OF THE MEASUREMENT UNCERTAINTY ............................................................................................................... 6 2. GENERAL INFORMATION .......................................................................................................................................... 7 2.1. ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 7 2.2. GENERAL DESCRIPTION OF EUT ...................................................................................................................................... 7 2.3. DESCRIPTION OF TEST MODES AND TEST FREQUENCY .......................................................................................................... 7 2.4. EQUIPMENTS USED DURING THE TEST .............................................................................................................................. 8 2.5. RELATED SUBMITTAL(S) / GRANT(S)................................................................................................................................. 8 2.6. MODIFICATIONS ........................................................................................................................................................... 8 3. TEST CONDITIONS AND RESULTS .............................................................................................................................. 9 3.1. CONDUCTED EMISSIONS TEST ......................................................................................................................................... 9 3.2. RADIATED EMISSIONS AND BAND EDGE ...................................................................................................…

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FCC ID:2AUY3YT-WM2000