T7HHT7254Wireless Mono Headset, Wireless Stereo Headset, Wireless Stereo ANC Headset

RTX725x GUIDE 1.0 Proprietary and Confidential High-End Headset Guide for RTX725x I n s t a l l a t i o n & C o n f i g u r a t i o n N e t w o r k D e p l o y m e n t O p e r a t i o n & M a n a g e m e n t Technical Reference Document Version 1.0 © Apr-2020 RTX A/S, Denmark RTX725x GUIDE 1.0 Proprietary and Confidential Trademarks RTX and the combinations of its logo thereof are trademarks of RTX A/S, Denmark. Other product names used in this publication are for identification purposes and maybe the trademarks of their respective companies. Disclaimer The contents of this document are provided about RTX products. RTX makes no representations with respect to completeness or accuracy of the contents of this publication and reserves the right to make changes to product descriptions, usage, etc., at any time without notice. No license, whether express, implied, to any intellectual property rights are granted by this publication Confidentiality This document should be regarded as confidential, unauthorized copying is not allowed © Apr-2020 RTX A/S, Denmark, All rights reserved http://www.rtx.dk RTX725x GUIDE 1.0 Proprietary and Confidential Table of Contents High-End Headset Guide for RTX725x ................................................................................................................................ 1 1 About This Document ................................................................................................................................................. 5 1.1 Audience ........................................................................................................................................................... 5 1.2 When Should I Read This Guide ........................................................................................................................ 5 1.3 What’s Inside This Guide ................................................................................................................................... 5 1.4 What’s Not in This guide ................................................................................................................................... 5 1.5 Abbreviations .................................................................................................................................................... 5 1.6 References/Related Documentation ................................................................................................................. 6 1.7 Document History ............................................................................................................................................. 6 1.8 What is new ....................................................................................................................................................... 6 1.9 Documentation Feedback ................................................................................................................................. 6 2 Package overview ....................................................................................................................................................... 7 2.1 Content .............................................................................................................................................................. 7 2.2 Damage inspection ............................................................................................................................................ 7 3 System design ............................................................................................................................................................. 8 3.1 DECT Registration .............................................................................................................................................. 8 Handover to VoIP multicell systems ............................................................................................................. 9 3.2 Bluetooth registration ....................................................................................................................................... 9 4 About the device ....................................................................................................................................................... 10 4.1 Type of RTX725x headsets .............................................................................................................................. 10 4.2 Features of the RTX725x series ....................................................................................................................... 10 4.3 Headsets overview .......................................................................................................................................... 12 Ear cushions ................................................................................................................................................ 13 Physical buttons .......................................................................................................................................... 14 4.4 LED overview ................................................................................................................................................... 15 LED patterns ................................................................................................................................................ 15 LED indication ............................................................................................................................................. 15 4.5 Battery ............................................................................................................................................................. 16 5 Features overview .................................................................................................................................................... 17 5.1 Eco mode ................................…

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RTX HONG KONG LTD TCBJ FORM-4 Issued by: TCB Administrator Revision 6 12/06/10 2020.10.04 MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, RTX HONG KONG LTD hereby authorize (Shenzhen STS Test Services 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: Ted Chong Signature:

Differences Description We RTX HONG KONG LTD state: Product： Wireless Mono Headset Wireless Stereo Headset Wireless Stereo ANC Headset Model Name： RTX7251 RTX7252 RTX7254 Trade Name: RTX FCC ID: T7HHT7254 IC: 4979B-HT7254 The Model Differences show as below table: RTX 7251 is mono headset, RTX7252 is stereo headset, RTX7254 is stereo headset with ANC function. They share the same main PCB layout. Signatory Date 2020-10-04 Signature: Name: Ted Chong Title: Engineering Manager Company: RTX HONG KONG LTD Address: 8TH FL CORPORATION SQUARE, 8 LAM LOK ST., KOWLOON BAY, HK.

RTX HONG KONG LTD TCBJ FORM-4 Issued by: TCB Administrator Revision 6 12/06/10 2020.10.04 MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Wireless Mono Headset,Wireless Stereo Headset,Wireless Stereo ANC Headset / RTX7251,RTX7252,RTX7254 /FCC ID: T7HHT7254) 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 • Schematics • Block diagram • Operation description • BOM • Tune Up Procedure These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. required to be submitted with this application be permanently withheld from public review. Please contact me if there is any information you may need. Sincerely, Name: Ted Chong Signature:

RTX7254 RTX7252 RTX7251

Model: RTX7254 S/N: YYWWSSSSSS FCC ID: T7HHT7254 IC:4979B-HT7254 2D Barcode 3.8V 600mAh Made in China HAC RoHS 50004892 (RTX7254) 3-June-2020REV. A Headset Model: RTX7251, RTX7252, RTX7254 RTX725x HS product Label Barcode format: 2D Barcode (Data Matrix) Barcode size: 4.7mm X 4.7mmMin Barcode contain information: 1.Serial number 2.IPEI code 3.BT MAC address Information show horizontally after scanned: YYWWSSSSSS ; 0EEEEZZZZZ ; MMMMMMMMMMMM Serial number format (YYWWSSSSSS): YY: Year of manufacturing (e.g. 10=2010) WW: Week of manufacturing SSSSSS: Progressive serial number. Serial starting number is 000001, the serial number will only reset to 000001 if under the following condition: a) The start of new PO production lot, plus the production week “WW” increment to a new week. Otherwise the serial number will continuous the previous lot of production. IPEI format: BT MAC format: 0EEEEZZZZZ IPEI code in text (HEX format) 0: this is a fix digit EEEE: EMC code ZZZZZ: start from 00001, this five digits cannot be all zero, that’s mean 00000 is not allowed (The SN, IPEI code & BT MAC address on headset must be matched with the one on packing box) H=5.5mm H=7mm H=5mm MMMMMMMMMMMM :BT MAC address in text Material: PET Positioning: Stick inside the battery compartment Color: Black text on white background 19.7 29.4 SIZE : W29.4mm x H19.7mm Location

RTX7254 DECT ANT1 DECT ANT2 BT ANT

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, All Test Data Presented in this report is only applicable to presented Test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No.: STS2008308W09 Issued for RTX HONG KONG LTD 8TH FL CORPORATION SQUARE, 8 LAM LOK ST., KOWLOON BAY, HK. Product Name: Wireless Mono Headset Wireless Stereo Headset Wireless Stereo ANC Headset Brand Name: RTX Model Name: RTX7254 Series Model: RTX7251,RTX7252 FCC ID: T7HHT7254 Test Standard: FCC Part 15.247 S T L A B S Page 2 of 73 Report No.: STS2008308W09 TEST RESULT CERTIFICATION Applicant’s Name ................... : RTX HONG KONG LTD Address .................................. : 8TH FL CORPORATION SQUARE, 8 LAM LOK ST., KOWLOON BAY, HK. Manufacturer's Name ............. : RTX HONG KONG LTD Address .................................. : 8TH FL CORPORATION SQUARE, 8 LAM LOK ST., KOWLOON BAY, HK. Product Description Product Name ........................ : Wireless Mono Headset Wireless Stereo Headset Wireless Stereo ANC Headset Brand Name ......................... : RTX Model Name ........................... : RTX7254 Series Model .......................... : RTX7251,RTX7252 Test Standards ....................... : FCC Part15.247 Test Procedure ....................... : ANSI C63.10-2013 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of STS, this document may be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ................................ : Date of receipt of test item .......... : 26 Aug. 2020 Date (s) of performance of tests . : 26 Aug. 2020 ~ 21 Sept. 2020 Date of Issue .............................. : 22 Sept. 2020 Test Result .................................. : Pass Testing Engineer : (Chris Chen) Technical Manager : (Sean she) Authorized Signatory : (Vita Li) Page 3 of 73 Report No.: STS2008308W09 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 FREQUENCY HOPPING SYSTEM REQUIREMENTS 10 2.4 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 12 2.5 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 12 2.6 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 13 2.7 EQUIPMENTS LIST 14 3. EMC EMISSION TEST 15 3.1 CONDUCTED EMISSION MEASUREMENT 15 3.2 RADIATED EMISSION MEASUREMENT 19 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 31 4.1 LIMIT 31 4.2 TEST PROCEDURE 31 4.3 TEST SETUP 31 4.4 EUT OPERATION CONDITIONS 31 4.5 TEST RESULTS 32 5. NUMBER OF HOPPING CHANNEL 47 5.1 LIMIT 47 5.2 TEST PROCEDURE 47 5.3 TEST SETUP 47 5.4 EUT OPERATION CONDITIONS 47 5.5 TEST RESULTS 48 6. AVERAGE TIME OF OCCUPANCY 49 6.1 LIMIT 49 6.2 TEST PROCEDURE 49 6.3 TEST SETUP 49 6.4 EUT OPERATION CONDITIONS 49 6.5 TEST RESULTS 50 Page 4 of 73 Report No.: STS2008308W09 Table of Contents Page 7. HOPPING CHANNEL SEPARATION MEASUREMEN 56 7.1 LIMIT 56 7.2 TEST PROCEDURE 56 7.3 TEST SETUP 56 7.4 EUT OPERATION CONDITIONS 56 7.5 TEST RESULTS 57 8. BANDWIDTH TEST 63 8.1 LIMIT 63 8.2 TEST PROCEDURE 63 8.3 TEST SETUP 63 8.4 EUT OPERATION CONDITIONS 63 8.5 TEST RESULTS 64 9. OUTPUT POWER TEST 70 9.1 LIMIT 70 9.2 TEST PROCEDURE 70 9.3 TEST SETUP 70 9.4 EUT OPERATION CONDITIONS 70 9.5 TEST RESULTS 71 10. ANTENNA REQUIREMENT 72 10.1 STANDARD REQUIREMENT 72 10.2 EUT ANTENNA 72 Page 5 of 73 Report No.: STS2008308W09 Revision History Rev. Issue Date Report NO. Effect Page Contents 00 22 Sept. 2020 STS2008308W09 ALL Initial Issue Page 6 of 73 Report No.: STS2008308W09 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247(a)(1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247(d) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(iii) Number of Hopping Frequency PASS -- 15.247(a)(iii) Dwell Time PASS -- 15.247(a)(1) 20dB Bandwidth 99% Bandwidth PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Page 7 of 73 Report No.: STS2008308W09 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 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 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 30-1GHz ±6.7dB 4 All emissions, radiated 1G-6GHz ±5.5dB 5 All emissions, radiated>6G ±5.8dB 6 Conducted Emission (9KHz-150KHz) ±4.43dB 7 Conducted Emission (150KHz-30MHz) ±5dB Page 8 of 73 Report No.: STS2008308W09 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name Wireless Mono Headset Wireless Stereo Headset W…

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Page 1 of 2 Report NO.: STS2008308 PUE&DSS&DTS Setup Photo Model: RTX7254 Conducted Emission Radiated Spurious Emission（Below 1GHz） Page 2 of 2 Report NO.: STS2008308 Radiated Spurious Emission （Above 1GHz ）