2A64D-HEART001True wireless earbuds

C5266091_X8_Ed.1 1/1 Letter of Authorization OVC Intelligence Technology Co., Ltd. Company: OVC Intelligence Technology Co., Ltd. Address: Room 1812 A, No.501 Qinhaidong road, Hengqin district, Zhuhai city, P.R.C. Product Name: True wireless earbuds Model Number: ZIIM HEART #001 FCC Identifier: 2A64D-HEART001 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: Wei Shang Date: 2022-06-06 Title: Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 OVC Intelligence Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2022-06-06 Subject: Request for Confidentiality FCC ID: 2A64D-HEART001 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 ______ 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. C5266091_X10_Ed.2 1/1 Sincerely, Name: Wei Shang Date: 2022-06-06 Title: Manager Signature of applicant:

APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Photo 10 Right earbud Left earbud Photo 11 Photo 12 Photo 13 Photo 14

FCC ID LABELING AND LOCATION FCC ID Label FCC ID: 2A64D-HEART001 The label is in the user manual.

APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Photo 1 Photo 2 Photo 3 Photo 4 Left Controller Photo 5 Photo 6 FPCB antenna Photo 7 Photo 8 Photo 9 Photo 10 Right Controller FPCB antenna Photo 11 Photo 12 Photo 13

FCC ID : 2A64D-HEART001 RF EXPOSURE EVALUATION METHOD FCC ID: 2A64D-HEART001 SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. The 1-g 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 The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. Maximum measured transmitter power. BT Right Earbuds 1Mbps Test Channel Frequency (MHz) Peak Output Power (dBm) Peak Output Power (mW) CH00 2402 2.874 1.938 CH39 2441 3.199 2.089 CH78 2480 3.559 2.269 2Mbps CH00 2402 2.873 1.938 CH39 2441 3.202 2.090 CH78 2480 3.562 2.271 3Mbps CH00 2402 2.873 1.938 CH39 2441 3.201 2.090 CH78 2480 3.566 2.273 FCC ID : 2A64D-HEART001 Left Earbuds 1Mbps Test Channel Frequency (MHz) Peak Output Power (dBm) Peak Output Power (mW) CH00 2402 3.105 2.044 CH39 2441 3.420 2.198 CH78 2480 3.673 2.330 2Mbps CH00 2402 3.110 2.046 CH39 2441 3.416 2.196 CH78 2480 3.666 2.326 3Mbps CH00 2402 3.117 2.050 CH39 2441 3.424 2.200 CH78 2480 3.671 2.329 BLE Right Earbuds Test channel Peak Output Power (dBm) Peak Output Power (mW) 1M Lowest 0.507 1.124 Middle 0.841 1.214 Highest 1.248 1.333 2M Lowest 0.521 1.127 Middle 0.851 1.216 Highest 1.269 1.339 Left Earbuds Test channel Peak Output Power (dBm) Peak Output Power (mW) 1M Lowest 0.928 1.238 Middle 0.976 1.252 Highest 1.248 1.333 2M Lowest 0.677 1.169 Middle 0.998 1.258 Highest 1.014 1.263 FCC ID : 2A64D-HEART001 Remark: The best case gain of the antenna is 2.42dBi. 2.42dBi logarithmic terms convert to numeric result is nearly 1.75 The 1-g 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)] BT Right Earbuds Te s t Channel Range tune up max power (dBm) [(max. power of channel, including tune-up tolerance, mW) (min. test separation distance,mm)] [f(GHz)] Result Limit 1Mbps CH00 2~4 4 2.512 5 2.402 0.779 3 CH39 2~4 4 2.512 5 2.441 0.785 3 CH78 2~4 4 2.512 5 2.480 0.791 3 2Mbps CH00 2~4 4 2.512 5 2.402 0.779 3 CH39 2~4 4 2.512 5 2.441 0.785 3 CH78 2~4 4 2.512 5 2.480 0.791 3 3Mbps CH00 2~4 4 2.512 5 2.402 0.779 3 CH39 2~4 4 2.512 5 2.441 0.785 3 CH78 2~4 4 2.512 5 2.480 0.791 3 FCC ID : 2A64D-HEART001 Left Earbuds Te s t Channel Range tune up max power (dBm) [(max. power of channel, including tune-up tolerance, mW) (min. test separation distance,mm)] [f(GHz)] Result Limit 1Mbps CH00 2~4 4 2.512 5 2.402 0.779 3 CH39 2~4 4 2.512 5 2.441 0.785 3 CH78 2~4 4 2.512 5 2.480 0.791 3 2Mbps CH00 2~4 4 2.512 5 2.402 0.779 3 CH39 2~4 4 2.512 5 2.441 0.785 3 CH78 2~4 4 2.512 5 2.480 0.791 3 3Mbps CH00 2~4 4 2.512 5 2.402 0.779 3 CH39 2~4 4 2.512 5 2.441 0.785 3 CH78 2~4 4 2.512 5 2.480 0.791 3 BLE Right Earbuds Te s t Channel Range tune up max power (dBm) [(max. power of channel, including tune-up tolerance, mW) (min. test separation distance,mm)] [f(GHz)] Result Limit 1M CH00 0~2 2 1.585 5 2.402 0.491 3 CH19 0~2 2 1.585 5 2.440 0.495 3 CH39 0~2 2 1.585 5 2.480 0.499 3 2M CH00 0~2 2 1.585 5 2.402 0.491 3 CH19 0~2 2 1.585 5 2.440 0.495 3 CH39 0~2 2 1.585 5 2.480 0.499 3 FCC ID : 2A64D-HEART001 Left Earbuds Te s t Channel Range tune up max power (dBm) [(max. power of channel, including tune-up tolerance, mW) (min. test separation distance,mm)] [f(GHz)] Result Limit 1M CH00 0~2 2 1.585 5 2.402 0.491 3 CH19 0~2 2 1.585 5 2.440 0.495 3 CH39 0~2 2 1.585 5 2.480 0.499 3 2M CH00 0~2 2 1.585 5 2.402 0.491 3 CH19 0~2 2 1.585 5 2.440 0.495 3 CH39 0~2 2 1.585 5 2.480 0.499 3 The test Result is less than 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Conclusion: No SAR is required.  

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202205296F02 This results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Page 1 of 50 TEST Report Applicant: OVC Intelligence Technology Co., Ltd. Address of Applicant: Room 1812 A, No.501 Qinhaidong road, Hengqin district, Zhuhai city, P.R.C. Manufacturer : OVC Intelligence Technology Co., Ltd. Address of Manufacturer : Room 1812 A, No.501 Qinhaidong road, Hengqin district, Zhuhai city, P.R.C. Equipment Under Test (EUT) Product Name: True wireless earbuds Model No.: ZIIM HEART #001 Series model: N/A Trade Mark: ZIIM FCC ID: 2A64D-HEART001 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: May 19,2022 Date of Test: May 19,2022- May 31,2022 Date of report issued: May 31,2022 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: HTT202205296F02 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 50 1. Version Version No. Date Description 00 May 31,2022 Original Tested/ Prepared By Date: May 31,2022 Project Engineer Check By: Date: May 31,2022 Reviewer Approved By : Date: May 31,2022 Authorized Signature Report No.: HTT202205296F02 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 50 2. Contents Page 1. VERSION ........................................................................................................................................................ 2 2. CONTENTS .................................................................................................................................................... 3 3. TEST SUMMARY ........................................................................................................................................... 4 4. GENERAL INFORMATION ............................................................................................................................ 5 4.1. GENERAL DESCRIPTION OF EUT ................................................................................................................ 5 4.2. TEST MODE ............................................................................................................................................... 7 4.3. DESCRIPTION OF SUPPORT UNITS .............................................................................................................. 7 4.4. DEVIATION FROM STANDARDS .................................................................................................................... 7 4.5. ABNORMALITIES FROM STANDARD CONDITIONS ........................................................................................... 7 4.6. TEST FACILITY ........................................................................................................................................... 7 4.7. TEST LOCATION ......................................................................................................................................... 7 4.8. ADDITIONAL INSTRUCTIONS ........................................................................................................................ 7 5. TEST INSTRUMENTS LIST ........................................................................................................................... 8 6. TEST RESULTS AND MEASUREMENT DATA ........................................................................................... 9 6.1. CONDUCTED EMISSIONS ............................................................................................................................ 9 6.2. CONDUCTED OUTPUT POWER .................................................................................................................. 12 6.3. CHANNEL BANDWIDTH .............................................................................................................................. 16 6.4. POWER SPECTRAL DENSITY ..................................................................................................................... 20 6.5. BAND EDGES ........................................................................................................................................... 24 6.5.1. Conducted Emission Method ......................................................................................................... 24 6.5.2. Radiated Emission Method ............................................................................................................ 27 6.6. SPURIOUS EMISSION ................................................................................................................................ 34 6.6.1. Conducted Emission Method ......................................................................................................... 34 6.6.2. Radiated Emission Method ............................................................................................................ 37 7. TEST SETUP PHOTO .................................................................................................................................. 50 8. EUT CONSTRUCTIONAL DETAILS ........................................................................................................... 50 Report No.: HTT202205296F02 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixia…

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Test setup photo RADIATED EMISSION CONDUCTED EMISSION