2AML6KR319Wireless earbuds

KTWS-19 This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: 1) this device may not cause harmful interference, and 2) this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: --Reorient or relocate the receiving antenna. --Increase the separation between the equipment and receiver. --Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. --Consult the dealer or an experienced radio/TV technician for help. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Radiation Exposure Statement This device complies with RF radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. FCC Statement

KINGRAY ELECTRONICS Co., LTD 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Tel: + 86-755-93772715 Fax: + 86-755-93772715 Series Models Description Date: 2020/08/04 To: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD FCC ID: 2AML6KR319 Dear Sir/Madam, We, KINGRAY ELECTRONICS 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 color and model number is different for these model: Product name: Wireless earbuds Model no.: KTWS-19, UZ-E039T-976, UZ-E039T-978, KTWS-20 Sincerely, Name: Jason wang Company: KINGRAY ELECTRONICS Co., LTD Address: 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Phone: + 86-755-93772715 Fax: + 86-755-93772715 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: Aug. 04, 2020 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 2AML6KR319 KTWS-19, UZ-E039T-976, UZ-E039T-978, KTWS-20 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: Jason wang Company: KINGRAY ELECTRONICS Co., LTD Address: 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Phone: + 86-755-93772715 Fax: + 86-755-93772715 E-Mail: [email protected]

KINGRAY ELECTRONICS Co., LTD 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Tel: + 86-755-93772715 Fax: + 86-755-93772715 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 8/6/2020 To whom it may concern: We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2AML6KR319 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: Jason wang Company: KINGRAY ELECTRONICS Co., LTD Address: 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Phone: + 86-755-93772715 Fax: + 86-755-93772715 E-Mail: [email protected]

FCC ID: 2AML6KR319 Charger base FCC ID: 2AML6KR319 FCC ID: 2AML6KR319

FCC ID: 2AML6KR319

FCC ID:2AML6KR319 FCC ID:2AML6KR319 BT antenna

RF Exposure evaluation FCC ID: 2AML6KR319 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 Channel Channel 00 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4DQPSK Channel Channel 00 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 8DPSK Channel Channel 00 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 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 1 1.259 0.4<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, No SAR is required. .....................End.........................

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 CTEST REPORT FCC PART 15.247 Report Reference No. ..................... : FCC ID. .............................................: GTS20200729007-1-2 2AML6KR319 Compiled by ( position+printedname+signature) ... : File administrators Jimmy Wang Supervised by (position+printedname+signature) .... : Test Engineer Aaron Tan Approved by (position+printedname+signature) .... : Manager Jason Hu Date of issue ..................................... : July 27, 2020 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 ............................ : KINGRAY ELECTRONICS Co., LTD Address ............................................ : 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Test specification ...........................: Standard ........................................... : FCC Part 15.247 TRF Originator .................................. : Shenzhen Global Test Service Co.,Ltd. Master TRF ....................................... : Dated 2014-12 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 earbuds Trade Mark ....................................... : N/A Manufacturer .................................... : KINGRAY ELECTRONICS Co., LTD Model/Type reference....................... : KTWS-19 Listed Models .................................. : UZ-E039T-976, UZ-E039T-978, KTWS-20 Modulation Type ............................... : GFSK,Π/4DQPSK,8DPSK Operation Frequency ........................ : From 2402MHz to 2480MHz Rating ............................................... : DC3.7V from battery Result................................................ : PASS Report No.: GTS20200729007-1-2 Page 2 of 48 T E S T R E P O R T Test Report No. : GTS20200729007-1-2 July 27, 2020 ____________________________________________________________________________________ Date of issue Equipment under Test : Wireless earbuds Model /Type : KTWS-19 Listed Models : UZ-E039T-976, UZ-E039T-978, KTWS-20 Applicant : KINGRAY ELECTRONICS Co., LTD Address : 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, China Manufacturer : KINGRAY ELECTRONICS Co., LTD Address : 3F, Building 13th, Xingwei the third Industrial Park, Fenghuang Village, Fuyong town, Baoan District, Shenzhen, Guangdong, 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.: GTS20200729007-1-2 Page 3 of 48 Contents 1 T E S T S T A N D A R D S ................................................................. 4 2 S U M M A R Y ............................................................................ 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Test Sample 5 2.4 Equipment Under Test 5 2.5 Short description of the Equipment under Test (EUT) 6 2.6 EUT operation mode 6 2.7 Block Diagram of Test Setup 6 2.8 Related Submittal(s) / Grant (s) 6 2.9 Modifications 6 3 T E S T E N V I R O N M E N T .............................................................. 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Environmental conditions 7 3.4 Summary of measurement results 8 3.5 Statement of the measurement uncertainty 8 3.6 Equipments Used during the Test 9 4 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 4.1 AC Power Conducted Emission 10 4.2 Radiated Emission 13 4.3 MaximumPeak Output Power 20 4.4 20dB Bandwidth 21 4.5 Frequency Separation 25 4.6 Number of hopping frequency 27 4.7 Time ofOccupancy (Dwell Time) 29 4.8 Out-of-band Emissions 33 4.9 Pseudorandom Frequency Hopping Sequence 41 4.10 Antenna Requirement 42 5 T E S T S E T U P P H O T O S O F T H E E U T ......................................... 43 6 P H O T O S O F T H E E U T ........................................................... 44 Report No.: GTS20200729007-1-2 Page 4 of 48 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:AmericanNationalStandardforTestingUnlicensedWirelessDevices Report No.: GTS20200729007-1-2 Page 5 of 48 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : July 21, 2020 Testing commenced on : July 22, 2020 Testing concluded on : July 26, 2020 2.2 Product Description Product Name: Wireless earbuds Model/Type reference: KTWS-19 Power supply: DC3.7V from battery Hardware version: 499263C-Y4 Software version: V1.0 Sample ID: GTS20200729007-1-2-1#/ GTS20200729007-1-2-2# Adapter(Auxiliary testProvided by the laborator) Mode:EP-TA20CBC Input:AC100-240V-50/60Hz，0.5A Output:DC 5V,2A Bluetooth : Supported Type: Bluetooth BR/EDR Modulation: GFSK, π/4DQPSK, 8DPSK Operation frequency: 2402MHz~2480MHz Channel number: 79 Channel separation: 1MHz …

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FCC ID: 2AML6KR319