2AHN6-AUBE139BE Earbuds with Display-ASST

Bytech NY Inc. 2585 West 13th Street,Brooklyn NY 11223, NewYork, United States Tel: 718-449-3700 |Fax: 718-449-2488 E-mail: [email protected] Date: 2020/07/22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: The RF chip, model AB5376A, which installed in our product BE Earbuds with Display- ASST, Model: BY-AU-BE-139-AC, FCC ID: 2AHN6-AUBE139, supports BDR (GFSK), EDR (π/4-DQPSK, 8DPSK), and BLE functions. For use in America and this chip will not support/enable BLE function. The BLE function has been shielded by the manufacturer using the software.

Y1:26MHZ MIC RF AB5376A KEY CHRGE LED Bluetooth:2402-2480MHz

Bytech NY Inc. 2585 West 13th Street , Brooklyn NY 11223 Tel: 718-449-3700 I Fax: 718-449-2488 E-mail: solimiz@bytechint l.com Date: 07/19/2021 To whom it may concern: Declaration Our product, .êvtech NY Inc.L Model number: BE Earbuds with Display-A55T, FCC ID: 2AHN6-AUBE139, is a twins earphone that has left earphone and right earphone. We would like to declare that the left earphone and right earphone are identical in the Antenna & RF circuits. 50 only choose the one of two earphones to test. 5incerely Yours , ιd 5ignature: Printed Name: 50li Mizrahi Title: President

Bytech NY Inc. 2585 West 13th Str四t，BrooklYQNY 11223, NewYork, United States Tel: 718-449-3700 I Fax: 718-449-2488 E-mail: 5olimiz(â)bvtechintl.com 2021-07-19 FCC certification No. Cover Letter We, Bytech NY InC., hereby submi1justi:fication for placing the FCC certi:fication No. in the associated user' s manual and charging case. According to the FCC regulation，吐leFCC certi:fication No. should be printed on the earbuds, but as the earbuds aJ毡toosmall to print the label (FCC ID: 2M剧6-AUBE139)，it will be moved to the user manual and charging case. The details are as below: A. Top cover (A) : The plastic ofthe top cover does not prov ide enough phy sical space to 且tthe printing of the FCC ID according to below reference picture. B . Area (B): The plastic ofth巳topcover does not provide enough phy sical space to fi t the printing of the FCC ID according to below reference picture. Conclusion Based on the above description of area AωB， we conclude that the device is unquestionably 100 small for enabling the FCC ID 10 be printed on10 any surface; we therefore request to move the FCC ID to the User manual and charging case. Sincerely Yours, Signature: Printed Name: Soli Mizrahi Title: President i3YTεCI-i BV -AU-8E-139-AC Input pçwe~:ßV .1A mαx 80付eryCOP9S:_Ity; 4.0 [!lAh per earbud 3回)阳ahCase FCC 10: 2AHN6-AUBE139 MadelnChln。 〈在隐 三/

Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 1 of 9 EXHIBIT B - EUT EXTERNAL PHOTOGRAPHS Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 2 of 9 Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 3 of 9 Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 4 of 9 Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 5 of 9 Left Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 6 of 9 Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 7 of 9 Right Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 8 of 9 Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 9 of 9

Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF EXHIBIT A - FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 1 of 6 EXHIBIT C - EUT INTERNAL PHOTOGRAPHS Left Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 2 of 6 Antenna Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 3 of 6 Right Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 4 of 6 Antenna Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 5 of 6 Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: SZ3210525-19300E-RF Page 6 of 6

Circuit description Battery(3.3-4.2V)prov ides energy for the B luetooth chip(A B5376A); Crystal oscillator(26MHz) provides the c lock signal for the B luetooth chip. Prod ucts is in broadcasting state w hen stand by, broad casting Bluetooth signals a ccording to a certain time interva l. Bluetooth signals get through a matc hing circuit, and the n transmitted to the space through the antenna(2402MHz-2408 MHz). When th e product is connecte d, the product can be in two-way commu nication with mobile phones, and then th e phone's Bluetooth m odule sends Blueto oth signals into space , the product receives the Bluetooth signa l through an antenn a, transmission to th e Bluetooth chip via m a tching circuit. 2480

Note: This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “★”. BACL is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. FCC PART 15.247 TEST REPORT For Bytech NY lnc. 2585 West 13th Street Brooklyn NY 11223 USA FCC ID: 2AHN6-AUBE139 Report Type: Original Report Product Type: BE Earbuds with Display-ASST Re port Number: SZ3210525-19300E-00 Re port Date: 2021-06-28 Reviewed B y: Jacob Kong RF Engineer Prepared By: Bay Area Compliance Laboratories Corp. (Shenzhen) 5F(B-West) , 6F, 7F, the 3rd Phase of Wan Li Industrial Building D, Shihua Rd, FuTian Free Trade Zone, Shenzhen, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 2 of 57 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 6 SPECIAL ACCESSORIES ................................................................................................................................................. 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 6 EXTERNAL I/O CABLE .................................................................................................................................................. 6 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 7 SUMMARY OF TEST RESULTS ............................................................................................................................... 8 TEST EQUIPMENT LIST ........................................................................................................................................... 9 FCC§15.247 (i), §1.1307 (b) (1) &§2.1093 – RF EXPOSURE ...................................................................................... 10 APPLICABLE STANDARD ............................................................................................................................................ 10 FCC §15.203 – ANTENNA REQUIREMENT .......................................................................................................... 11 APPLICABLE STANDARD ............................................................................................................................................ 11 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 11 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 EUT SETUP ................................................................................................................................................................ 12 EMI TEST RECEIVER SETUP ....................................................................................................................................... 12 TEST PROCEDURE ...................................................................................................................................................... 12 CORRECTED FACTOR & MARGIN CALCULATION ....................................................................................................... 13 TEST DATA ................................................................................................................................................................ 13 FCC §15.205, §15.209 & §15.247(d) – RADIATED EMISSIONS ........................................................................... 16 APPLICABLE STANDARD .....…

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Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 30 of 57 APPENDIX Appendix A: 20dB Emission Bandwidth Test Result TestMode Antenna Channel 20db EBW[MHz] Limit[MHz] Verdict DH1 Ant1 24020.951--- PASS 24410.951--- PASS 24800.951--- PASS 2DH1 Ant1 24021.260--- PASS 24411.263--- PASS 24801.260--- PASS 3DH1 Ant1 24021.254--- PASS 24411.254--- PASS 24801.251--- PASS Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 31 of 57 Test Graphs DH1_Ant1_2402 DH1_Ant1_2441 DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 32 of 57 2DH1_Ant1_2402 2DH1_Ant1_2441 2DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 33 of 57 3DH1_Ant1_2402 3DH1_Ant1_2441 3DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 34 of 57 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Channel OCB [MHz] Limit[MHz] Verdict DH1 Ant1 24020.836--- PASS 24410.836--- PASS 24800.833--- PASS 2DH1 Ant1 24021.154--- PASS 24411.154--- PASS 24801.154--- PASS 3DH1 Ant1 24021.151--- PASS 24411.151--- PASS 24801.151--- PASS Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 35 of 57 Test Graphs DH1_Ant1_2402 DH1_Ant1_2441 DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 36 of 57 2DH1_Ant1_2402 2DH1_Ant1_2441 2DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 37 of 57 3DH1_Ant1_2402 3DH1_Ant1_2441 3DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 38 of 57 Appendix C: Maximum conducted Peak output power Test Result TestMode Antenna Channel Result[dBm] Limit[dBm] Verdict DH1 Ant1 2402-6.40≤20.97 PASS 2441-7.13≤20.97 PASS 2480-7.65≤20.97 PASS 2DH1 Ant1 2402-4.16≤20.97 PASS 2441-4.98≤20.97 PASS 2480-5.39≤20.97 PASS 3DH1 Ant1 2402-3.44≤20.97 PASS 2441-4.31≤20.97 PASS 2480-4.71≤20.97 PASS Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 39 of 57 Test Graphs DH1_Ant1_2402 DH1_Ant1_2441 DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 40 of 57 2DH1_Ant1_2402 2DH1_Ant1_2441 2DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 41 of 57 3DH1_Ant1_2402 3DH1_Ant1_2441 3DH1_Ant1_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 42 of 57 Appendix D: Carrier frequency separation Test Result TestMode Antenna Channel Result[MHz] Limit[MHz] Verdict DH1 Ant1 Hop1≥0.634 PASS 2DH1 Ant1 Hop1.003≥0.842 PASS 3DH1 Ant1 Hop1.003≥0.836 PASS Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 43 of 57 Test Graphs DH1_Ant1_Hop 2DH1_Ant1_Hop 3DH1_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 44 of 57 Appendix E: Time of occupancy Test Result TestMode Antenna Channel BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.393200.126≤0.4 PASS DH3 Ant1 Hop 1.641800.295≤0.4 PASS DH5 Ant1 Hop 2.881300.375≤0.4 PASS 2DH1 Ant1 Hop 0.403300.133≤0.4 PASS 2DH3 Ant1 Hop 1.651700.28≤0.4 PASS 2DH5 Ant1 Hop 2.891200.346≤0.4 PASS 3DH1 Ant1 Hop 0.413300.134≤0.4 PASS 3DH3 Ant1 Hop 1.651800.296≤0.4 PASS 3DH5 Ant1 Hop 2.891200.347≤0.4 PASS Note 1：A period time=0.4*79=31.6(S), Result=BurstWidth*Totalhops Note 2: Totalhops=Hopping Number in 3.16s*10 Note 3: Hopping Number in 3.16s=Total of highest signals in 3.16s(Second high signals were other channel) Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 45 of 57 Test Graphs DH1_Ant1_Hop DH3_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 46 of 57 DH5_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 47 of 57 2DH1_Ant1_Hop 2DH3_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 48 of 57 2DH5_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 49 of 57 3DH1_Ant1_Hop 3DH3_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 50 of 57 3DH5_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 51 of 57 Appendix F: Number of hopping channels Test Result TestMode Antenna Channel Result[Num] Limit[Num] Verdict DH1 Ant1 Hop79≥15 PASS 2DH1 Ant1 Hop79≥15 PASS 3DH1 Ant1 Hop79≥15 PASS Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 52 of 57 Test Graphs DH1_Ant1_Hop 2DH1_Ant1_Hop 3DH1_Ant1_Hop Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 53 of 57 Appendix G: Band edge measurements Test Graphs DH1_Ant1_Low_2402 DH1_Ant1_High_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 54 of 57 DH1_Ant1_Low_Hop_2402 DH1_Ant1_High_Hop_2480 2DH1_Ant1_Low_2402 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 55 of 57 2DH1_Ant1_High_2480 2DH1_Ant1_Low_Hop_2402 2DH1_Ant1_High_Hop_2480 Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: SZ3210525-19300E-00 FCC Part 15.247 Page 56 of 57 3DH1_Ant1_Low_2402 3DH1_Ant1_High_2480 3DH1_Ant1_Low_Hop_2402 Bay Area Compliance Laboratories Corp. (Shenzhen) Report…

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