2A4KI-E5True Wireless Earbuds

Zhengzhou Yilian International Trade Co., Ltd.

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Application Details

Equipment Class: DTS - Digital Transmission System
Date of Grant: Feb 21, 2022
Application Purpose: Original Equipment
Date of Application: Feb 21, 2022
Equipment Note: True Wireless Earbuds
Frequency Range: 2402.00000000 - 2480.00000000
Company: Zhengzhou Yilian International Trade Co., Ltd.
Country: China

Documents & Files

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Document Text

Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.

Users Manual

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Cover Letter(s)

C5266091_X8_Ed.1 1/1 Letter of Authorization Zhengzhou Yilian International Trade Co., Ltd. Company: Zhengzhou Yilian International Trade Co., Ltd. Address: 2105, Building B, Zhengshang Hanghai Square,Erqi District, Zhengzhou, China Product Name: True Wireless Earbuds Model Number: Ailun-E5 FCC Identifier: 2A4KI-E5 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: Li Zhi Date: Feb.18.2022 Title: Engineer Signature of applicant:

Cover Letter(s)

C5266091_X10_Ed.2 1/1 Zhengzhou Yilian International Trade Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: Feb.18 .2022 Subject: Request for Confidentiality FCC ID: 2A4KI-E5 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 NOTE 2 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 ☐ NOTE 1 ☐ Internal Photos ☐ NOTE 1 ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ____45 __ days from the date of the Grant of Equipment Authorization and prior to marketing. 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. Sincerely, C5266091_X10_Ed.2 1/1 Signature: Name: Li Zhi Title: Engineer

External Photos

ID Label/Location Info

Model: Ailun-E5 FCC ID: 2A4KI-E5 Label Location

Internal Photos

Internal Photos Left ANT Right

RF Exposure Info

Shenzhen CTB Testing Co., Ltd. FCC ID: 2A4KI-E5 Portable device According to §15.247(e)(i) and §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 KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR 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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BT: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.4021.1551.301±12.001.58<50.491273.00YES 2.4411.0351.271±12.001.58<50.495243.00YES 2.4800.0911.021±12.001.58<50.499183.00YES 2.4022.9451.972±13.002.00<50.618473.00YES 2.4412.861.932±13.002.00<50.623473.00YES 2.4801.9061.552±13.002.00<50.628433.00YES 2.4021.2931.351.5±12.501.78<50.551213.00YES 2.4411.1821.311.5±12.501.78<50.555673.00YES 2.4802.0971.621.5±12.501.78<50.560093.00YES EDR mode (GFSK) EDR mode (π /4DQPSK) EDR mode (8DPSK) BLE: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.4021.2231.331±12.001.58<50.491273.00YES 2.4411.3281.361±12.001.58<50.495243.00YES 2.4800.5861.141±12.001.58<50.499183.00YES EDR mode (GFSK) Conclusion: For the max result : 0.62843≤ FCC Limit 3.0 for 1g SAR.

Test Report

Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB220216037RFX Report Tel: 4008-707-283Web: http://www.ctb-lab.net Page 1 of 45 TEST REPORT Compiled by: Reviewed by: Approved by: Chen Zheng Arron Liu Bin Mei / Director The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: True Wireless Earbuds FCC ID: 2A4KI-E5 Trademark: Model Number: Ailun-E5 Prepared For: Zhengzhou Yilian International Trade Co., Ltd. Address: 2105, Building B, Zhengshang Hanghai Square,Erqi District, Zhengzhou, China Manufacturer: Dongguan OSM Technologies Co., Ltd Address: 1F-6F, Building A, Longdi Industrial Park, No. 6 Tiansha Road, Keyuan City,Tangxia Town,Dongguan,China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: Floor 1&2, Building A, No. 26 of Xinhe Road, Xinqiao Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong China Sample Received Date: Feb. 11, 2022 Sample tested Date: Feb. 11, 2022 to Feb. 16, 2022 Issue Date: Feb. 16, 2022 Report No.: CTB220216037RFX Te s t Standards FCC Part15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB220216037RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 45 TABLE OF CONTENT Test Report Declaration Page 1. VERSION............................................................ 4 2. TEST SUMMARY ..................................................... 5 3. MEASUREMENT UNCERTAINTY ....................................... 6 4. PRODUCT INFORMATION AND TEST SETUP ........................... 7 4.1 Product Information ..................................................... 7 4.2 Test Setup Configuration ................................................ 7 4.3 Support Equipment ..................................................... 7 4.4 Channel List ........................................................... 8 4.5 Test Mode ............................................................. 8 4.6 Test Environment ....................................................... 8 5. TEST FACILITY AND TEST INSTRUMENT USED ......................... 9 5.1 Test Facility ............................................................ 9 5.2 Test Instrument Used ................................................... 9 6. AC POWER LINE CONDUCTED EMISSION .............................. 12 6.1 Block Diagram Of Test Setup............................................ 12 6.2 Limit ................................................................. 12 6.3 Test procedure ........................................................ 12 6.4 Test Result ........................................................... 14 7. RADIATED SPURIOUS EMISSION ..................................... 16 7.1 Block Diagram Of Test Setup............................................ 16 7.2 Limit ................................................................. 16 7.3 Test procedure ........................................................ 17 7.4 Test Result ........................................................... 18 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS ............ 32 8.1 Block Diagram Of Test Setup............................................ 32 8.2 Limit ................................................................. 32 8.3 Test procedure ........................................................ 32 8.4 Test Result ........................................................... 33 9. COUDUCTED PEAK OUTPUT POWER ................................. 35 9.1 Block Diagram Of Test Setup............................................ 35 9.2 Limit ................................................................. 35 9.3 Test procedure ........................................................ 35 9.4 Test Result ........................................................... 36 10. 6DB OCCUPIED BANDWIDTH ........................................ 38 10.1 Block Diagram Of Test Setup .......................................... 38 10.2 Limit ................................................................ 38 10.3 Test procedure ....................................................... 38 10.4 Test Result .......................................................... 38 11. POWER SPECTRAL DENSITY ........................................ 40 11.1 Block Diagram Of Test Setup .......................................... 40 11.2 Limit ................................................................ 40 Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB220216037RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 45 11.3 Test procedure ....................................................... 40 11.4 Test Result .......................................................... 40 12. ANTENNA REQUIREMENT ........................................... 40 13. EUT TEST SETUP PHOTOGRAPHS ................................... 43 (Note: N/A means not applicable) Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB220216037RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 45 1. VERSION Report N o. Issue Date Description Approved CTB220216037RFX Feb. 16, 2022 Original Valid Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB220216037RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 5 of 45 2. TEST SUMMARY The Product has been tested according to the following specifications: Test Item Test Requirement Test method Result AC Power Line Conducted Emission 47 CFR Part 15 Subpart C Section 15.207 ANSI C63.10-2013 Pass Radiated Spurious emissions 47 CFR Part 15 Subpart C Section 15.205/15.209 ANSI C63.10-2013 PAS S Band edge and RF Conducted Spurious Emissions 47 CFR Part 15 Subpart C Section 15.247(d)/15.205(a) ANSI C63.1…

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Test Setup Photos

Radiated Emission Left Below 1G Right Below 1G Left Above 1G Right Above 1G Conducted emissions