2AU75BTHP1-FBBluetooth Headset

Power Input:DC 5V Battery Voltage:DC 3.7V

Shenzhen Aita Technology Co., Ltd. U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA ATTENTION: FCC Certification – Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Southern Telecom Inc. FRN: 0017985201 Contact Name: Lina Qian Address: 5601 1st Ave 2nd Floor Brooklyn, NY 11220 United States Telephone No: (718)567-7778 131 Email: [email protected] This letter is to confirm that we (“the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: 2023-10-11 Signed by (Printed Name/Title): This Agreement is valid until: The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Aita Technology Co., Ltd. Grantee Code: 2AU75 FCC ID: 2AU75BTHP1-FB Contact Name: Haizol Chan Address: No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District, Shenzhen, China Telephone No: 0755-83975836 Email: [email protected] Applicant Signature: Date: 2023-10-11 Signed by (Printed Name/Title): Haizol Chan / Manager

Shenzhen Aita Technology Co., Ltd. 2023.10.11 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2AU75BTHP1-FB [Shenzhen Aita Technology Co., Ltd.] (“the applicant”) 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. Sincerely, (Applicant signature) (Applicant printed name) Haizol Chan Shenzhen Aita Technology Co., Ltd. 2023.10.11 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2AU75BTHP1-FB [Shenzhen Aita Technology Co., Ltd.] (“the applicant”) 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. Sincerely, (Applicant signature) (Applicant printed name) Haizol Chan

Shenzhen Aita Technology Co., Ltd. 2023.10.11 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Bluetooth Headset Trademark: N/A MODEL : HKLEDBTHP1-FB AT-BT883 FCC ID:2AU75BTHP1-FB To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Haizol Chan /Manager Contact information / address: No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District, Shenzhen, China

Shenzhen Aita Technology Co., Ltd. 2023.10.11 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing Co., Ltd to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : Haizol Chan /Manager Contact information / address: No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District, Shenzhen, China

Shenzhen Aita Technology Co., Ltd. Model Difference 2023/10/11 EUT NAME: Bluetooth Headset FCC ID: 2AU75BTHP1-FB MODEL : HKLEDBTHP1-FB AT-BT883 All the model are the same circuit and RF module, except model names and appearance of the color. Regards Sincerely Client’s signature: Client’s name / title : Haizol Chan /Manager Contact information / address: No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District, Shenzhen, China

External Photos

Size:10*5mm FCC ID:2AU75BTHP1-FB Label location

Internal Photos Antenna

Product specification Quick Reference Date All the technical data and information contained herein are subject to change without prior notice AntennaLayout&moduleonthe systemboard AntennaGain GainTable Antenna module on the system board Frequency2.45GHz*1 Ant. Port Input Pwr. (dBm)0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm)-2.3 (Input pwr – loss pwr) Peak EIRP(dBm)1.3 Directivity (dBi)1(all direction antenna) Efficiency (dB)-2.3 (58.5%) Gain (dBi)1.3 (Peak Gain XY-plane) Maximum Power (dBm)1.3 (XY-plane) Minimum Power (dBm)-4(XY-plane) Avg. Power (dBm)-0.5(XY-plane) Max/Min Ratio (dB)5.3(XY-plane) Max/Avg Ratio (dB)1.8(XY-plane) Min/Avg Ratio (dB)-3. 5(XY-plane) Average Gain (dB)-0.5 (Avg Gain XY-plane) Unit in dBi @2.44GHz XY-planeXZ-planeYZ-planeEfficiency PeakAvg. PeakAvg.PeakAvg. Module Board 1.3-0.51.7-3.81.1-3.0 58.5% Shenzhen Aita Technology Co., Ltd. No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District, Shenzhen, China ReturnLoss TheEnvironmentofAntennaRadiationPattern 3Dradiationpatterndiagram XY-planeXZ-planeYZ-plane

No.：BCTC/RF-EMC-007 Page: 1 of 79 Edition：B.0 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2308902856E Applicant: Shenzhen Aita Technology Co., Ltd Product Name: Bluetooth Headset Model/Type reference: HKLEDBTHP1-FB Tested Date: 2023-08-28 to 2023-09-11 Issued Date: 2023-09-11 Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 2 of 79 Edition：B.0 FCC ID:2AU75BTHP1-FB 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 BCTC Testing 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: Bluetooth Headset Trademark: N/A Model/Type Reference: HKLEDBTHP1-FB AT-BT883 Prepared For: Shenzhen Aita Technology Co., Ltd Address: Floor 1, 2 & 4, No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District shenzhen Manufacturer: Shenzhen Aita Technology Co., Ltd Address: Floor 1, 2 & 4, No. 114, East Xintang Village, Dakang Community, Henggang Street, Longgang District shenzhen Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2023-08-28 Sample tested Date: 2023-08-28 to 2023-09-11 Issue Date: 2023-09-11 Report No.: BCTC2308902856E Test Standards FCC Part15.247 ANSI C63.10-2013 Test Results PASS Remark: This is Bluetooth Classic radio test report. Tested by: Approved by: Kelsey Tan/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 3 of 79 Edition：B.0 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 8 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test procedure .................................................................................................... 13 6.4 EUT operating Conditions ................................................................................... 13 6.5 Test Result .......................................................................................................... 14 7. Radiated emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test procedure .................................................................................................... 18 7.4 EUT operating Conditions ................................................................................... 19 7.5 Test Result .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 23 8.1 Block Diagram Of Test Setup .............................................................................. 23 8.2 Limit .................................................................................................................... 23 8.3 Test procedure .................................................................................................... 24 8.4 EUT operating Conditions ................................................................................... 24 8.5 Test Result .......................................................................................................... 25 9. Spurious RF Conducted Emissions ..................................................................... 26 9.1 Block Diagram Of Test Setup .............................................................................. 26 9.2 Limit .................................................................................................................... 26 9.3 Test procedure .................................................................................................... 26 9.4 Test Result ......................................…

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Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 69 of 79 Edition：B.0 14. Dwell Time 14.1 Block Diagram Of Test Setup 14.2 Limit Frequency hopping systems in the 2400-2483.5 MHz band shall use at least 15 channels. The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of 0.4 seconds multiplied by the number of hopping channels employed. Frequency hopping systems may avoid or suppress transmissions on a particular hopping frequency provided that a minimum of 15 channels are used. 14.3 Test procedure 1. Remove the antenna from the EUT and then connect a low RF cable from the antenna port to the spectrum. 2. Set spectrum analyzer span = 0. Centred on a hopping channel; 3. Set RBW = 1MHz and VBW = 3MHz.Sweep = as necessary to capture the entire dwell time per hopping channel. Set the EUT for DH5, DH3 and DH1 packet transmitting. 4. Use the marker-delta function to determine the dwell time. If this value varies with different modes of operation (e.g.. data rate. modulation format. etc.). repeat this test for each variation. The limit is specified in one of the subparagraphs of this Section. Submit this plot(s). 14.4 Test Result DH5 Packet permit maximum 1600 / 79 / 6 hops per second in each channel (5 time slots RX, 1 time slot TX). DH3 Packet permit maximum 1600 / 79 / 4 hops per second in each channel (3 time slots RX, 1 time slot TX). DH1 Packet permit maximum 1600 / 79 /2 hops per second in each channel (1 time slot RX, 1 time slot TX). So, the Dwell Time can be calculated as follows: DH5:1600/79/6*0.4*79*(MkrDelta)/1000 DH3:1600/79/4*0.4*79*(MkrDelta)/1000 DH1:1600/79/2*0.4*79*(MkrDelta)/1000 Remark: Mkr Delta is once pulse time. Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 70 of 79 Edition：B.0 Condition Mode Frequency (MHz) Pulse Time (ms) Total Dwell Time (s) Limit (s) Verdict NVNT 1-DH1 2441 0.377 0.121 0.4 Pass NVNT 1-DH3 2441 1.632 0.261 0.4 Pass NVNT 1-DH5 2441 2.881 0.307 0.4 Pass NVNT 2-DH1 2441 0.386 0.124 0.4 Pass NVNT 2-DH3 2441 1.638 0.262 0.4 Pass NVNT 2-DH5 2441 2.88 0.307 0.4 Pass NVNT 3-DH1 2441 0.387 0.124 0.4 Pass NVNT 3-DH3 2441 1.637 0.262 0.4 Pass NVNT 3-DH5 2441 2.888 0.308 0.4 Pass Test Graphs Dwell NVNT 1-DH1 2441MHz One Burst Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 71 of 79 Edition：B.0 Dwell NVNT 1-DH3 2441MHz One Burst Dwell NVNT 1-DH5 2441MHz One Burst Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 72 of 79 Edition：B.0 Dwell NVNT 2-DH1 2441MHz One Burst Dwell NVNT 2-DH3 2441MHz One Burst Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 73 of 79 Edition：B.0 Dwell NVNT 2-DH5 2441MHz One Burst Dwell NVNT 3-DH1 2441MHz One Burst Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 74 of 79 Edition：B.0 Dwell NVNT 3-DH3 2441MHz One Burst Dwell NVNT 3-DH5 2441MHz One Burst Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 75 of 79 Edition：B.0 15. Antenna Requirement 15.1 Limit 15.203 requirement: For intentional device, according to 15.203: an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. 15.2 Test Result The EUT antenna is Internal antenna, fulfill the requirement of this section. Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 76 of 79 Edition：B.0 16. EUT Photographs EUT Photo 1 Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 77 of 79 Edition：B.0 17. EUT Test Setup Photographs Conducted Measurement Photo Radiated Measurement Photos Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 78 of 79 Edition：B.0 Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 79 of 79 Edition：B.0 STATEMENT 1. The equipment lists are traceable to the national reference standards. 2. The test report can not be partially copied unless prior written approval is issued from our lab. 3. The test report is invalid without the "special seal for inspection and testing". 4. The test report is invalid without the signature of the approver. 5. The test process and test result is only related to the Unit Under Test. 6. Sample information is provided by the client and the laboratory is not responsible for its authenticity. 7. The quality system of our laboratory is in accordance with ISO/IEC17025. 8. If there is any objection to this test report, the client should inform issuing laboratory within 15 days from the date of receiving test report. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China TEL：400-788-9558 P. C.: 518103 FAX：0755-33229357 Website：http://www.chnbctc.com E-Mail：[email protected] ※※※※※ END ※※※※※

Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 77 of 79 Edition：B.0 17. EUT Test Setup Photographs Conducted Measurement Photo Radiated Measurement Photos Report No.: BCTC2308902856E No.：BCTC/RF-EMC-007 Page: 78 of 79 Edition：B.0