2AGKLSLBTHDSETWIRELESS HEADPHONE

Liangying Industrial CO.,LTD Gurao Industria District .Chaoyang Shantou China Tel: 18929642775 Fax: 0086-754-87642201 Date: April 20, 2021 FCC ID: 2AGKLSLBTHDSET Dear Sir/Madam, We, Liangying Industrial CO.,LTD. Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: Product name: WIRELESS HEADPHONE Model No.: SLBTHDSET Series model: BT HEADSET, SL HD , DBX150, Stereo Headphones, itek HD, itek Headphone, PROHEAD, BT HEADPHONES, TM-059, HD HEADPHONE MSD Sincerely, Name/Title: Tori Qiu/ Manager Company: Liangying Industrial CO.,LTD Address: Gurao Industria District .Chaoyang Shantou China Phone: 18929642775 Fax: 0086-754-87642201 E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date: April 20, 2021 TO WHOM IT MAY CONCERN Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2AGKLSLBTHDSET SLBTHDSET For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title: Tori Qiu/ Manager Company: Liangying Industrial CO.,LTD Address: Gurao Industria District .Chaoyang Shantou China Phone: 18929642775 Fax: 0086-754-87642201 E-Mail: [email protected]

Liangying Industrial CO.,LTD Gurao Industria District .Chaoyang Shantou China Tel: 18929642775 Fax: 0086-754-87642201 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 4/20/2021 To whom it may concern: We, Liangying Industrial CO.,LTD the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2AGKLSLBTHDSET including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title: Tori Qiu/ Manager Company: Liangying Industrial CO.,LTD Address: Gurao Industria District .Chaoyang Shantou China Phone: 18929642775 Fax: 0086-754-87642201 E-Mail: [email protected]

FCC ID: 2AGKLSLBTHDSET External Photos of the EUT Fig.1 Fig.2 FCC ID: 2AGKLSLBTHDSET Fig.3 Fig.4 FCC ID: 2AGKLSLBTHDSET Fig.5

FCC ID: 2AGKLSLBTHDSET Label and Location Size: L: 2.0cm*W: 1.5cm Label and Location WIRELESS HEADPHONE Model No.: SLBTHDSET FCC ID: 2AGKLSLBTHDSET

FCC ID: 2AGKLSLBTHDSET Internal Photos of the EUT Fig.1 Fig.2 BT Antenna FCC ID: 2AGKLSLBTHDSET Fig.3 Fig.4 FCC ID: 2AGKLSLBTHDSET Fig.5

RF Exposure evaluation FCC ID: 2AGKLSLBTHDSET 1.1. Applicable Standard According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to §1.1310 and §2.1093 RF exposure requirement KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 1.2. Requirement According to KDB447498 D01 General RF Exposure Guidance v06 Section 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 Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(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 • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 5) in section 4.1 is applied to determine SAR test exclusion. 1.3. Manufacturing tolerance GFSK(Peak) Channel Channel 00 Channel 39 Channel 78 Target (dBm) 5.0 3.0 3.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4DQPSK (Peak) Channel Channel 00 Channel 39 Channel 78 Target (dBm) 5.0 4.0 4.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 2 of 2 2. E v a l u a t i o n R e s u l t Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power (including tune-up tolerance) SAR Test Exclusion Threshold SAR Test Exclusion dBm mW BT 2.480 5 6.0 3.9811 1.25<3.0 Yes 3. C o n c l u s i o n The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06 .....................End of Report.........................

Shenzhen Global Test Service Co.,Ltd. No.7-101 and 8A-104, Building 7 and 8, DCC Cultural and Creative Garden, No.98, Pingxin North Road, Shangmugu Community, Pinghu Street, Longgang District, Shenzhen, Guangdong FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ..................... : FCC ID. ............................................ : GTS20210421020-1-1 2AGKLSLBTHDSET Compiled by ( position+printed name+signature) .. : File administrators Jimmy Wang Supervised by ( position+printed name+signature) .. : Test Engineer Aaron Tan Approved by ( position+printed name+signature) .. : Manager Jason Hu Date of issue ..................................... : Apr. 21, 2021 Representative Laboratory Name .: Shenzhen Global Test Service Co., Ltd. Address ............................................ : No.7-101 and 8A-104, Building 7 and 8, DCC Cultural and Creative Garden, No.98, Pingxin North Road, Shangmugu Community, Pinghu Street, Longgang District, Shenzhen, Guangdong Applicant’s name ............................ : Liangying Electronic Industrial Co., Ltd. Address ............................................ : Gurao Industria District .Chaoyang,Shantou,China Test specification ...........................: Standard ........................................... : FCC Part 15.247 Shenzhen Global Test 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 Global Test Service Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Global Test 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 .....................: WIRELESS HEADPHONE Trade Mark ....................................... : N/A Manufacturer .................................... : Liangying Electronic Industrial Co., Ltd. Model/Type reference....................... : SLBTHDSET Listed Models .................................. : BT HEADSET, SL HD , DBX150, Stereo Headphones, itek HD, itek Headphone, PROHEAD, BT HEADPHONES, TM-059, HD HEADPHONE MSD Modulation ....................................... : GFSK, Π/4DQPSK Frequency .......................................... From 2402MHz to 2480MHz Rating ............................................... : DC 3.70V from battery and DC 5V From External circuit Result................................................ : PASS Report No.: GTS20210421020-1-1 Page 2 of 42 T E S T R E P O R T Test Report No. : GTS20210421020-1-1 Apr. 21, 2021 ____________________________________________________________________________________ Date of issue Equipment under Test : WIRELESS HEADPHONE Model /Type : SLBTHDSET Listed Models : BT HEADSET, SL HD , DBX150, Stereo Headphones, itek HD, itek Headphone, PROHEAD, BT HEADPHONES, TM-059, HD HEADPHONE MSD Applicant : Liangying Electronic Industrial Co., Ltd. Address : Gurao Industria District .Chaoyang,Shantou,China Manufacturer : Liangying Electronic Industrial Co., Ltd. Address : Gurao Industria District .Chaoyang,Shantou,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.: GTS20210421020-1-1 Page 3 of 42 Contents 1 T E S T S T A N D A R D S ................................................................. 4 S U M M A R Y ..................................................................................... 5 1.1 General Remarks 5 1.2 Product Description 5 1.3 Equipment Under Test 5 1.4 Short description of the Equipment under Test (EUT) 5 1.5 EUT operation mode 6 1.6 Block Diagram of Test Setup 6 1.7 Related Submittal(s) / Grant (s) 6 1.8 Modifications 6 2 T E S T E N V I R O N M E N T .............................................................. 7 2.1 Address of the test laboratory 7 2.2 Test Facility 7 2.3 Environmental conditions 7 2.4 Summary of measurement results 8 2.5 Statement of the measurement uncertainty 8 2.6 Equipments Used during the Test 9 3 T E S T C O N D I T I O N S A N D R E S U L T S ........................................... 10 3.1 AC Power Conducted Emission 10 3.2 Radiated Emission 13 3.3 Maximum Peak Output Power 19 3.4 20dB Bandwidth 20 3.5 Frequency Separation 23 3.6 Number of hopping frequency 25 3.7 Time of Occupancy (Dwell Time) 27 3.8 Out-of-band Emissions 30 3.9 Pseudorandom Frequency Hopping Sequence 36 3.10 Antenna Requirement 37 4 T E S T S E T U P P H O T O S O F T H E E U T ......................................... 38 5 P H O T O S O F T H E E U T ........................................................... 39 Report No.: GTS20210421020-1-1 Page 4 of 42 1 T E S T S T A N D A R D S 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.: GTS20210421020-1-1 Page 5 of 42 S U M M A R Y 1.1 General Remarks Date of receipt of test sample : Apr. 01, 2021 Testing commenced on : Apr. 01, 2021 Testing concluded on : Apr. 21, 2021 1.2 Product Description Product Name: WIRELESS HEADPHONE Model/Type reference: SLBTHDSET, BT HEADSET, SL HD, DBX150, Stereo Headphones, itek HD, itek Headphone, PROHEAD, BT HEADPHONES, TM-059, HD HEADPHONE MSD Power supply: DC 3.70V from battery and DC 5V From External circuit Adapter information (Auxiliary test supplied by test Lab） : Model:EP-TA20CBC Input:AC100-240V-50/60Hz，0.5A Output:DC 5V,2A Testing sample ID： GTS20210421020-1-1-1# (Engineer sample), GTS20210421020-1-1-2# (Normal sample) Software version: V1.1 Hardware version: V1.1 Bluetooth : Supported Type: Bluetooth BR/EDR Modulation: GFSK, π/4DQPSK Operati…

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FCC ID: 2AGKLSLBTHDSET Test Setup Photos of the EUT Test Setup Photo(s) of Radiated Emissions Measurement Fig. 1 Fig. 2 FCC ID: 2AGKLSLBTHDSET Test Setup Photo of Line Conducted Emissions Measurement