2AP4PALEXAS3Open Ear Bluetooth Headphones

FCC Warning Statement Changes or modif ications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B d igital 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 a 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.

< SHENZHEN ALEX TECHNOLOGY CO., LTD. > Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD21046 Date: Apr. 24, 2020 Subject; Request for Long Term Confidentiality FCC ID: 2AP4PALEXAS3 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Sam Liu Title: General Manager

SHENZHEN ALEX TECHNOLOGY CO., LTD. Letter of Authorization Company: SHENZHEN ALEX TECHNOLOGY CO., LTD. Address: UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Product name: Open Ear Bluetooth Headphones Trade name: N/A Model name: OPENEAR Duet, OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR Chorus FCC Identifier: 2AP4PALEXAS3 We authorize MiCOM LabsInc, 575 Boulder Court, Pleasanton, California94566, USA, to act on our behalf on all matters concerning the above named equipment. Any individual within MiCOM Labs is authorized to act on our behalf and take action on the application. We declare that MiCOM LabsInc, 575 Boulder Court, Pleasanton, California 94566, USA, 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 MiCOM Labs on our behalf shall have the same effect as acts of our own. Name: Sam Liu Date: Apr. 24, 2020 Title: General Manager Signature of applicant:

Model Difference Declaration To Whom It May Concern, We, SHENZHEN ALEX TECHNOLOGY CO., LTD. Product: Open Ear Bluetooth Headphones Trademark: N/A Model Number: OPENEAR Duet, OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR Chorus All model’s the function, software and electric circuit are the same, only with a product color and model named different. Test sample model: OPENEAR Duet. Please contact me if you have any question. Name: Sam Liu Date: Apr. 24, 2020 Title: General Manager Signature of applicant:

Model: OPENEAR Duet Model: OPENEAR Duet Model: OPENEAR Duet

FCC ID LABEL: Label Location: FCC ID: 2 AP4 PAL EXAS3 Product na me: Open Ear Bluetooth Headphones Model No.: OPENEAR Duet This device complies with Part 15 of the FCC Rules. Operation is subject to the follo wing two conditions: (1)This device may not cause har mful interference, and (2)This device must accept any interference received, including interference that may cau se undesired operation. Long: 3cm Width: 2cm

Model: OPENEAR Duet Model: OPENEAR Duet Model: OPENEAR Duet Chip Antenna

Page 1 of 30 Report No.: UNIA20040715ER-02 FCC RADIO TEST REPORT FCC ID: 2AP4PALEXAS3 Product： Open Ear Bluetooth Headphones Trade Name： N/A Model Name： OPENEAR Duet Serial Model： OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR Chorus Report No.： UNIA20040715ER-02 Prepared for SHENZHEN ALEX TECHNOLOGY CO., LTD. UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Prepared by Shenzhen United Testing Technology Co., Ltd. 2F, Annex Bldg, Jiahuangyuan Tech Park, #365 Baotian 1 Rd, Tiegang Community, Xixiang Str, Bao'an District, Shenzhen, China Page 2 of 30 Report No.: UNIA20040715ER-02 TEST RESULT CERTIFICATION Applicant’s name ................. : SHENZHEN ALEX TECHNOLOGY CO., LTD. Address ................................. : UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Manufacture's Name ............ : SHENZHEN ALEX TECHNOLOGY CO., LTD. Address ................................. : UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Product description Product name............................... : Open Ear Bluetooth Headphones Trade Mark ............................ : N/A Model and/or type reference : OPENEAR Duet, OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR Chorus Standards ............................. : FCC Rules and Regulations Part 15 Subpart C Section 15.249, ANSI C63.10: 2013 This device described above has been tested by Shenzhen United Testing Technology Co., Ltd., and 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 UNI, this document may be altered or revised by Shenzhen United Testing Technology Co., Ltd., personnel only, and shall be noted in the revision of the document. Date of Test ..........................................: Date (s) of performance of tests .............: Apr. 07, 2020 ~ Apr. 24, 2020 Date of Issue ........................................: Apr. 24, 2020 Test Result ............................................: Pass Prepared by: Bob liao/Editor Reviewer: Kahn yang/Supervisor Approved & Authorized Signer: Liuze/Manager Page 3 of 30 Report No.: UNIA20040715ER-02 Table of Contents Page 1 TEST SUMMARY 4 2 GENERAL INFORMATION 6 2.1 GENERAL DESCRIPTION OF EUT 6 2.2 CARRIER FREQUENCY OF CHANNELS 7 2.3 TEST MODE 7 2.4 TEST SETUP 7 2.5 DESCRIPTION TEST PERIPHERAL AND EUT PERIPHERAL 8 2.6 MEASUREMENT INSTRUMENTS LIST 9 3 CONDUCTED EMISSION 10 3.1 TEST LIMIT 10 3.2 TEST SETUP 10 3.3 TEST PROCEDURE 11 3.4 TEST RESULT 11 4 RADIATED EMISSION 14 4.1 TEST LIMIT 14 4.2 TEST SETUP 15 4.3 TEST PROCEDURE 16 4.4 TEST RESULT 16 5 BAND EDGE 23 5.1 TEST LIMIT 23 5.2 TEST PROCEDURE 23 5.3 TEST RESULT 23 6 20dB BANDWIDTH 26 6.1 TEST SETUP 26 6.2 TEST PROCEDURE 26 6.4 TEST RESULT 26 7 ANTENNA REQUIREMENT 28 8 PHOTO OF TEST 29 8.1 RADIATED EMISSION 29 8.2 CONDUCTED EMISSION 30 Page 4 of 30 Report No.: UNIA20040715ER-02 1 TEST SUMMARY 1.1 TEST PROCEDURES AND RESULTS ITEM STANGARD RESULT CONDUCTED EMISSION FCC Part 15.207 COMPLIANT RADIATED EMISSION FCC Part 15.209/15.249 COMPLIANT BAND EDGE FCC Part 15.249/15.205 COMPLIANT 20dB BANDWIDTH FCC Part 15.215 COMPLIANT ANTENNA REQUIREMENT FCC Part 15.203 COMPLIANT 1.2 TEST FACILITY Test Firm : Shenzhen United Testing Technology Co., Ltd. Address : 2F, Annex Bldg, Jiahuangyuan Tech Park, #365 Baotian 1 Rd, Tiegang Community, Xixiang Str, Bao'an District, Shenzhen, China The testing quality ability of our laboratory meet with "Quality Law of People's Republic of China" Clause 19.The testing quality system of our laboratory meets with ISO/IEC-17025 requirements. This approval result is accepted by MRA of APLAC. Our test facility is recognized, certified, or accredited by the following organizations: A2LA Certificate Number: 4747.01 The EMC Laboratory has been accredited by A2LA, and in compliance with ISO/IEC 17025:2017 General Requirements for testing Laboratories. FCC Registration Number: 674885 The EMC Laboratory has been registered and fully described in a report filed with the (FCC) Federal Communications commission. IC Registration Number: 21947 The EMC Laboratory has been registered and fully described in a report filed with the (IC) Industry Canada. Page 5 of 30 Report No.: UNIA20040715ER-02 1.3 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 %. A. Conducted Measurement: Test Site Method Measurement Frequency Range U, (dB) NOTE UNI ANSI 9kHz ~ 150kHz 2.96 150kHz ~ 30MHz 2.44 B. Radiated Measurement: Test Site Method Measurement Frequency Range U, (dB) NOTE UNI ANSI 9kHz ~ 30MHz 2.50 30MHz ~ 1000MHz 4.80 1000MHz ~ 6000MHz 4.13 Page 6 of 30 Report No.: UNIA20040715ER-02 2 GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Equipment: Open Ear Bluetooth Headphones Trade Mark: N/A Model Name: OPENEAR Duet Serial No.: OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR C horus Model Difference: All model’s the function, software and electric circuit are the same, only with a product color and model named different. Test sample model: OPENEAR Duet. FCC ID: 2AP4PALEXAS3 Antenna Type: Chip Antenna Antenna Gai n: 1.20dBi Operation frequency: 2402MHz~2480MHz Number of Channels: 40CH Modulation Type: GFSK Battery: DC 3.7V, 120mAh Power Source: DC 5.0V from adapter with AC 120(240)V/60Hz Page 7 of 30 Report No.: UNIA20040715ER-02 2.2 CARRIER FREQUENCY OF CHANNELS Channel List Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 00 2402 10 2422 20 2442 30 2462 01 2404 11 2424 21 2444 31 2464 02 2406 12 2426 22 2446 32 2466 03 2408 13 2428 23 2448 33 2468 04 2410 14 2430 24 2450 34 2470 05 2412 15 2432 25 2452 35 247…

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Page 1 of 33 Report No.: UNIA20040715ER-01 FCC RADIO TEST REPORT FCC ID: 2AP4PALEXAS3 Product： Open Ear Bluetooth Headphones Trade Name： N/A Model Name： OPENEAR Duet Serial Model： OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR Chorus Report No.： UNIA20040715ER-01 Prepared for SHENZHEN ALEX TECHNOLOGY CO., LTD. UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Prepared by Shenzhen United Testing Technology Co., Ltd. 2F, Annex Bldg, Jiahuangyuan Tech Park, #365 Baotian 1 Rd, Tiegang Community, Xixiang Str, Bao'an District, Shenzhen, China Page 2 of 33 Report No.: UNIA20040715ER-01 TEST RESULT CERTIFICATION Applicant’s name ................. : SHENZHEN ALEX TECHNOLOGY CO., LTD. Address ................................. : UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Manufacture's Name ............ : SHENZHEN ALEX TECHNOLOGY CO., LTD. Address ................................. : UNIT 407-409, HEHUAN BUSINESS CENTER, BLD.36 YINTIAN GONGYE RD, BAO'AN, Shenzhen, China Product description Product name............................... : Open Ear Bluetooth Headphones Trade Mark ............................ : N/A Model and/or type reference : OPENEAR Duet, OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR Chorus Standards ............................. : FCC Rules and Regulations Part 15 Subpart C Section 15.249, ANSI C63.10: 2013 This device described above has been tested by Shenzhen United Testing Technology Co., Ltd., and 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 UNI, this document may be altered or revised by Shenzhen United Testing Technology Co., Ltd., personnel only, and shall be noted in the revision of the document. Date of Test ..........................................: Date (s) of performance of tests .............: Apr. 07, 2020 ~ Apr. 24, 2020 Date of Issue ........................................: Apr. 24, 2020 Test Result ............................................: Pass Prepared by: Bob liao/Editor Reviewer: Kahn yang/Supervisor Approved & Authorized Signer: Liuze/Manager Page 3 of 33 Report No.: UNIA20040715ER-01 Table of Contents Page 1 TEST SUMMARY 4 2 GENERAL INFORMATION 6 2.1 GENERAL DESCRIPTION OF EUT 6 2.2 CARRIER FREQUENCY OF CHANNELS 7 2.3 TEST MODE 7 2.4 TEST SETUP 8 2.5 DESCRIPTION TEST PERIPHERAL AND EUT PERIPHERAL 8 2.6 MEASUREMENT INSTRUMENTS LIST 9 3 CONDUCTED EMISSION 10 3.1 TEST LIMIT 10 3.2 TEST SETUP 10 3.3 TEST PROCEDURE 11 3.4 TEST RESULT 11 4 RADIATED EMISSION 14 4.1 TEST LIMIT 14 4.2 TEST SETUP 15 4.3 TEST PROCEDURE 16 4.4 TEST RESULT 16 5 BAND EDGE 22 5.1 TEST LIMIT 22 5.2 TEST PROCEDURE 22 5.3 TEST RESULT 22 6 20dB BANDWIDTH 25 6.1 TEST SETUP 25 6.2 TEST PROCEDURE 25 6.4 TEST RESULT 25 7 ANTENNA REQUIREMENT 31 8 PHOTO OF TEST 32 8.1 RADIATED EMISSION 32 8.2 CONDUCTED EMISSION 33 Page 4 of 33 Report No.: UNIA20040715ER-01 1 TEST SUMMARY 1.1 TEST PROCEDURES AND RESULTS ITEM STANGARD RESULT CONDUCTED EMISSION FCC Part 15.207 COMPLIANT RADIATED EMISSION FCC Part 15.209/15.249 COMPLIANT BAND EDGE FCC Part 15.249/15.205 COMPLIANT 20dB BANDWIDTH FCC Part 15.215 COMPLIANT ANTENNA REQUIREMENT FCC Part 15.203 COMPLIANT 1.2 TEST FACILITY Test Firm : Shenzhen United Testing Technology Co., Ltd. Address : 2F, Annex Bldg, Jiahuangyuan Tech Park, #365 Baotian 1 Rd, Tiegang Community, Xixiang Str, Bao'an District, Shenzhen, China The testing quality ability of our laboratory meet with "Quality Law of People's Republic of China" Clause 19.The testing quality system of our laboratory meets with ISO/IEC-17025 requirements. This approval result is accepted by MRA of APLAC. Our test facility is recognized, certified, or accredited by the following organizations: A2LA Certificate Number: 4747.01 The EMC Laboratory has been accredited by A2LA, and in compliance with ISO/IEC 17025:2017 General Requirements for testing Laboratories. FCC Registration Number: 674885 The EMC Laboratory has been registered and fully described in a report filed with the (FCC) Federal Communications commission. IC Registration Number: 21947 The EMC Laboratory has been registered and fully described in a report filed with the (IC) Industry Canada. Page 5 of 33 Report No.: UNIA20040715ER-01 1.3 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 %. A. Conducted Measurement: Test Site Method Measurement Frequency Range U, (dB) NOTE UNI ANSI 9kHz ~ 150kHz 2.96 150kHz ~ 30MHz 2.44 B. Radiated Measurement: Test Site Method Measurement Frequency Range U, (dB) NOTE UNI ANSI 9kHz ~ 30MHz 2.50 30MHz ~ 1000MHz 4.80 1000MHz ~ 6000MHz 4.13 Page 6 of 33 Report No.: UNIA20040715ER-01 2 GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF EUT Equipment: Open Ear Bluetooth Headphones Trade Mark: N/A Model Name: OPENEAR Duet Serial No.: OPENEAR Trio, OPENEAR Alto, OPENEAR Duo, OPENEAR C horus Model Difference: All model’s the function, software and electric circuit are the same, only with a product color and model named different. Test sample model: OPENEAR Duet. FCC ID: 2AP4PALEXAS3 Antenna Type: Chip Antenna Antenna Gai n: 1.20dBi Operation frequency: 2402MHz~2480MHz Number of Channels: 79CH Modulation Type: GFSK, π/4 DQPSK, 8DPSK Battery: DC 3.7V, 120mAh Power Source: DC 5.0V from adapter with AC 120(240)V/60Hz Page 7 of 33 Report No.: UNIA20040715ER-01 2.2 CARRIER FREQUENCY OF CHANNELS Channel List Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 00 2402 21 2423 42 2444 63 2465 01 2403 22 2424 43 2445 64 2466 02 2404 23 2425 44 2446 65 2467 03 2405 24 2426 45 2447 66 2468 04 2406 25 2427 46 2448 67 2469 05 2407 26 2…

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Model: OPENEAR Duet Radiated Emission test Model: OPENEAR Duet Conducted Emission test