2AYOC-BUDSPLUSTWS BC EARBUDS

PRESS each bud for 7 seconds (left and right buds need to be turned on separately)

Kaibo Audio Inc. 2.911 (d)(7)USA Agent v1.3 Section 2.911(d)(7) USA Agent for Service of Process Company name: Kaibo Audio Inc. Address: 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States Product Name: TWS BC EARBUDS FCC ID: 2AYOC-BUDSPLUS Model(s): Buds Plus 2.911(d)(7) USA Designated Agent for Service of Process We, [Kaibo Audio Inc.] (“the applicant”) designate [Kaibo Audio Inc.] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We Acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Agent obligation: We Acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Kaibo Audio Inc. 2.911 (d)(7)USA Agent v1.3 USA Agent Company name: Kaibo Audio Inc. Address: 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States FRN：0030398077 Contact Name: CP Lee Telephone No: 512 484 8587 Email: [email protected] Applicant Company name: Kaibo Audio Inc. Address: 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States FRN：0030398077 FCC Grantee Code: 2AYOC Contact Name: CP Lee Telephone No: 512 484 8587 Email: [email protected] Signature: Title: CEO Signature: Title: CEO Date: 2023-12-18 Date: 2023-12-18 NOTE 1: An applicant located in the United States may designate itself as the agent for service of process. Reference; Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-nation al-security-threats-to-the-communications-supply-chain-through-the

Kaibo Audio Inc. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 18, 2023 FCC ID: 2AYOC-BUDSPLUS Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing Kaibo Audio Inc. certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing Kaibo Audio Inc. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Applicant: Kaibo Audio Inc. Address: 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States Contact Person: CP Lee Tel.: 512 484 8587 Email: [email protected] Sincerely, Signature:

SymbolsLWTA Dimensions2.0+/-0.21.25+/-0.20.6+/-0.10.6+/-0.1 ① INPUT ② GND Dimensions（Unit：mm） L w ①② T ( Side View ) ( Bottom View ) ( Top View ) A Features 1.Surface Mounted Devices with a small dimension of 2.0 x 1.25 x 0.6 mm 3 meet future miniaturization trend. 2.Embedded and LTCC (Low Temperature Co-fired Ceramic) technology is able to future integrate with system design as well as beautifying the housing of final product. 3.High Stability in Temperature / Humidity Change Applications 1. Bluetooth 2. Wireless LAN 3. ISM band 2.4GHz wireless applications H L X201212506A08 Manufacturer：Shenzhen Helixun Technology Co., LTD Address：1905, Building 2, Jiufang Square, Tiezai Road, Gongle Community, Xixiang Street, Baoan District, Shenzhen 1905 TEL: 0755-23591525, FAX: 0755-23591525 Antenna Type: SMD Antenna Evaluation Board and Matching Circuits PI Type Matching Networks GND VIA 50ΩFeeding Line 0.55 0.9 0.9 0.4 1.4 5 3 Clearance Area L or C 0Ω 1.5 nH A08 0.5 pF 50 90 H L X201212506A08 H L X201212506A08 S11-Parameter Frequency(MHz)2400245024802500 VSWR1.561.161.481.79 Radiation Pattern coordinates： H L X201212506A08 Y-Z Plane X-Z Plane X-Y Plane Frequency2400MHz2450MHz2490MHz Avg. gain1.300.930.45 Peak gain2.7 2.6 2 .5 Efficiency57% 54%5 3% H L X201212506A08 Dependability Test Temperature range Relative Humidity range Operating Temperature range Storage Temperature range 25±5°C 55~75%RH -40°C~+85°C -40°C~+85°C Vibration Resist The device should satisfy the electrical characteristics specified in paragraph 8.1~8.4 after applied to the vibration of 10 to 55Hz with amplitude of 1.5mm for 2 hours each in X , Y and Z directions. Drop Shock The device should satisfy the electrical characteristics specified in paragraph 8.1~8.4 after dropping onto the hard wooden board from the height of 100cm for 3 times each facet of the 3 dimensions of the device. Solder Heat Proof The device should be satisfied after preheating at 120°C~150°C for 120 seconds and dipping in soldering Sn at 255°C+10°C for 5 ±0.5 seconds，or electric iron 300°C-10°C for 3 ±0.5 seconds， without damnify. Adhesive Strength of Termination The device have no remarkable damage or removal of the termination after horizontal force of 5N(≦0603)； 10N(>0603)with 10±1 seconds. BendingResistTest Weld the product to the center part of the PCB with the thickness 1.6 ±0.2mm as the illustration shows, and keep exerting force arrow-ward on it at speed of :1mm/S , and hold for 5±1S at the position of 1.5mm bending distance , so far , any peeling off of the product metal coating should not be detected . ItemPost Dependability Tolerance Central Frequency±5 MHz Band Width ±5 MHz Gain ±0.1 dBi V.S.W.R (in BW)±0.1 Post Dependability Tolerance H L X 201212506A08 Moisture Proof The device should satisfy the electrical characteristics specified in paragraph 8.1~8.4 after exposed to the temperature 60±2°Cand the relative humidity 90~95% RH for 96 hours and 1~2 hours recovery time under normal condition. High Temperature Endurance The device should satisfy the electrical characteristics specified in paragraph 8.1~8.4 after exposed to temperature 85±5°C for 96±2 hours and 1~2 hours recovery time under normal temperature. Low Temperature Endurance The device should also satisfy the electrical characteristics specified in paragraph 8.1~8.4 after exposed to the temperature -40°C±5°C for 96±2 hours and to 2 hours recovery time under normal temperature. Temperature Cycle Test The device should also satisfy the electrical characteristics specified in paragraph 8.1~8.4 after exposed to the low temperature -40°C and high temperature +85°C for 30±2 min each by 5 cycles and 1 to 2 hours recovery time under normal temperature. Reflow Soldering Standard Condition H L X 201212506A08 Packaging and Dimensions (2012) Plastic Tape Remarks for Package Reserve a length of 150~200mm for the trailer of the carrier and 250~300 mm for the leader of the carrier and further 250mm of cover tape at the leading part of the carrier. Reel（4000 pcs/Reel） Storage Perio Storage Period Storage Period Product should be used within twelve months of receipt. MSL 1 / Storage Temperature Range : -40~85 degree C, Humidity : <60 %R H H L X 201212506A08

Kaibo Audio Inc. Date: December 18, 2023 Product Model Number: Buds Plus FCC ID: 2AYOC-BUDSPLUS To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that ORGANIZATION. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by ORGANIZATION. on our behalf shall have the same effect as acts of our own. By: CP Lee Contact Listed on FCC Wesbite Title: CEO Email: [email protected] Telephone: 512 484 8587 On behalf of: Kaibo Audio Inc.

Kaibo Audio Inc. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 18, 2023 Subject; Request for Confidentiality FCC ID: 2AYOC-BUDSPLUS 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 Software Security Requirements for UNII devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. 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: CP Lee Title: CEO

FCC ID: 2AYOC-BUDSPLUS External

Page 1 of 1 Label and Information FCC Label Sample FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

FCC ID: 2AYOC-BUDSPLUS Internal BT ANT

- Page 1 of 9 - Report No.: HB20231204001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com RF EXPOSURE Test Report Product: TWS BC EARBUDS Trade Mark: Kaibo Model Number: Buds Plus FCC ID: 2AYOC-BUDSPLUS Prepared for Kaibo Audio Inc. 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 9 - Report No.: HB20231204001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 5 1.1 DESCRIPTION OF EUT ................................................................................................................................................. 5 1.2 TEST MODE .............................................................................................................................................................. 5 1.3 ANCILLARY EQUIPMENT .............................................................................................................................................. 5 2 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 6 2.1 TEST LABORATORY ..................................................................................................................................................... 6 2.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 6 2.3 MEASUREMENT UNCERTAINTY ..................................................................................................................................... 6 2.4 TEST SOFTWARE ........................................................................................................................................................ 6 3 LIST OF TEST EQUIPMENT .................................................................................................................................. 7 4 RF EXPOSURE .................................................................................................................................................... 8 4.1 STANDALONE SAR TEST EXCLUSION CONSIDERATIONS........................................................................................................ 8 4.1.1. Limit ............................................................................................................................................................ 8 4.1.2. Test Procedures ........................................................................................................................................... 8 4.1.3. Test Result ................................................................................................................................................... 9 - Page 3 of 9 - Report No.: HB20231204001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com TEST RESULT CERTIFICATION Applicant’s Name ................. : Kaibo Audio Inc. Address ................................. : 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States Manufacturer's Name .......... : Dongguan Pure Audio Technology Co., Ltd. Address ................................. : Room 814, No.183 Chonghuan Middle Road, Shijie Town, Dongguan City, Guangdong Province Product description Product name ........................ : TWS BC EARBUDS Model Number ....................... : Buds Plus Standards ............................. : FCC CFR 47 PART 1 , 1.1310 Test procedure ..................... : KDB 447498 D01 v06 This device described above has been tested by Shenzhen HongBiao Certification& Testing Co., Ltd and the test results show that the equipment under test (EUT) is in compliance with the EMC requirements. And it is applicable only to the tested sample identified in the report. Date of Test ........................................... : Date (s) of performance of tests ............. : November 29, 2023 ~ December 09, 2023 Test Result .............................................. : Pass Testing Engineer : ( Z o e Su) Technical Manager : ( G a r y Lu) Authorized Signatory : (L e o S u) - Page 4 of 9 - Report No.: HB20231204001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Revision History Revised No. Date of Issue Description 01 December 11, 2023 Original - Page 5 of 9 - Report No.: HB20231204001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com 1 General Description 1.1 Description of EUT Product name: TWS BC EARBUDS Model name: Buds Plus Series Model: / Different of series model: N/A Operation frequency: 2402-2480MHz Modulation type: GFSK, π/4-DQPSK, 8DPSK Bit Rate of transmitter: 1 Mbps, 2Mbps, 3Mbps Antenna type: SMD Antenna Antenna gain: 2.7dBi Max. output power: 0.52dBm Hardware version: V1.…

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- Page 1 of 56 - Report No.: HB20231204001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Test Report Product: TWS BC EARBUDS Trade Mark: Kaibo Model Number: Buds Plus FCC ID: 2AYOC-BUDSPLUS Prepared for Kaibo Audio Inc. 14001 Avery Ranch Blvd. 1003, Austin, Texas, 78717 United States Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 56 - Report No.: HB20231204001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 6 1.1 DESCRIPTION OF EUT ................................................................................................................................................. 6 1.2 TEST MODE .............................................................................................................................................................. 6 1.3 OPERATION CHANNEL LIST .......................................................................................................................................... 6 1.4 TEST SETUP .............................................................................................................................................................. 7 1.5 ANCILLARY EQUIPMENT .............................................................................................................................................. 7 2 SUMMARY OF TEST RESULT ............................................................................................................................... 8 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 9 3.1 TEST LABORATORY ..................................................................................................................................................... 9 3.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 9 3.3 MEASUREMENT UNCERTAINTY ..................................................................................................................................... 9 3.4 TEST SOFTWARE ........................................................................................................................................................ 9 4 LIST OF TEST EQUIPMENT .................................................................................................................................10 5 TEST ITEM AND RESULTS ...................................................................................................................................12 5.1 ANTENNA REQUIREMENT .......................................................................................................................................... 12 5.1.1 Standard Requirement ............................................................................................................................. 12 5.1.2 Test Result ................................................................................................................................................. 12 5.2 CONDUCTED EMISSION ............................................................................................................................................. 13 5.2.1 Limits ........................................................................................................................................................ 13 5.2.2 Test Procedures ......................................................................................................................................... 13 5.2.3 Test Setup ................................................................................................................................................. 14 5.2.4 Test Result ................................................................................................................................................. 14 5.3 RADIATED EMISSION ................................................................................................................................................ 17 5.3.1 Limits ........................................................................................................................................................ 17 5.3.2 Test Procedures ......................................................................................................................................... 17 5.3.3 Test Setup ................................................................................................................................................. 17 5.3.4 Test Result ................................................................................................................................................. 18 5.3.5 Radiated Band Edge ................................................................................................................................. 23 5.4 PEAK OUTPUT POWER .............................................................................................................................................. 24 5.4.1 Limit .......................................................................................................................................................... 2…

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FCC ID: 2AYOC-BUDSPLUS Radiated Emission Below 1GHz (Left ear) ‘ Radiated Emission Above 1GHz (Left ear) Conducted emission