2BBVN-TH330True wireless Bluetooth earphones

TRUE WIRELESS STEREO EARPHONE (TWS) Th330 INSTRUCTION MANUAL Package contents Main units Charging case User’s manual (warranty card included) Ear tips USB Type-C cleaning cloth changing cable # 需配简图 # Charging Case 1 When charging earphones, the battery level and indicator light status A: Constant light indicates that the battery level is above 70% B: Constant light indicates that the battery level is above 40% C: Constant light indicates that the battery level is above 15% Flashing indicates that the battery level is above 10% D: Slow flashing indicates that the battery level is above 5% Flash indicates that the battery level is below 5% When charging the battery case, the battery level and indicator light status A: 100% constant light,over 70% flashing B: More than 70% is constantly on, below which it flashes C: Above 40% remains on, below flashing D: Normally on, indicating normal charging 2 Earphone charging pin 3 USB charging interface Earphones 4 Microphone 5 Touch Control Panel 6 LED Indicator 7 Charge Point 8 Ear tips 9 Left&Right Abstract Thank you for choosing MiAoLo Th330 True Wireless earphones. The earphones adopt 3D printing combined with resin adhesive process, making them more comfortable to wear. This product will meet your pursuit of high-quality music and be suitable for different environments. Charging #可增加充电示意简图# Charging the case Please use the included TYPE-C charging cable to charge, connect it to a 5V (500mA-2A) power adapter, and plug the other end into the USB charging interface on the back of the charging case. When the charging case indicator light D (red light) is constantly on, it indicates that charging is already in progress. At this time, other indicator lights flash or remain on to display the current charging case's approximate battery level; When fully charged, the charging case D indicator light (red light) goes out, and the other three battery indicator lights will remain on. Charging earphones When the charging case is charged, place the earphones in the corresponding slot inside the charging case to charge them. When charging, the red indicator light of the earphones will always be on; After being fully charged, the light does not turn on. When charging earphones, the corresponding battery indicator light of the charging case will be constantly on or flashing. When the battery indicator light C of the charging case flashes, it is recommended to charge the charging case as soon as possible; When the charging case's battery indicator light D (red light) flashes, it is recommended to charge the charging case immediately. Charging note: When the battery pack is completely discharged, the earphones placed in the battery pack for charging will automatically turn on and connect back to the last paired device. At this time, if the earphones are not in use, please manually turn off the earphones. The manual shutdown method can be found on page 5 of the manual. Using the product Power ON Automatic power on: Remove the earphones from the battery case, and the indicator light will stay on for 1 second, accompanied by a power on voice prompt. Manual power on: When the earphones are turned off, press and hold the touch area for 1 second, and the white indicator light on the earphones will light up for about 1 second, accompanied by a power on voice prompt. Power OFF Automatic shutdown: Place the earphones in the battery case, and the red indicator light remains on, indicating successful automatic shutdown. Manual shutdown: In the power on state, press and hold the touch area for 6 seconds, and the red indicator light on the earphones will remain on for about 1 second, accompanied by a voice prompt to shut down. The manual shutdown is successful. Pairing The first time the earphones are used: a. Remove the earphones from the charging case, they will automatically turn on and enter pairing mode, and the earphone indicator light will flash red and white alternately. b. Open the Bluetooth search on your phone, place the earphones up close, find "MiAoLo_TH330", and click on Connect. c. After successful connection, there will be a voice prompt of "connected", and at the same time, the status after the earphone name on the device will display as "connected". d.Later, we will turn on the earphones, which will automatically search for devices that have already been paired. Pairing with a second or subsequent devices: a. Place the earphones in the charging case, disconnect and turn off the previously connected device b. Remove the earphones from the charging case and wait for them to enter the pairing mode with alternating red and white indicator lights. d. Open the device Bluetooth search, place the earphones up close, find 'MiAoLo_TH330', and click on Connect. e. After successful connection, there will be a voice prompt of "connected", and at the same time, the status after the earphone name on the device will display as "connected". Sleep mode a. After the earphones enter pairing mode, if there is no operation or device connection within 2 minutes, they will enter sleep mode. b. When the earphones are in sleep mode, double-click the touch area to wake them up and enter pairing mode. Wearing the product 1. Select an ear tip size suitable for your ear and slide them on to the tip of the earphone. 2. Insert the earphones into your ear canals and adjust themto a comfortable fit. Be sure that the ear tips have a secure seal. Operation of Touch Contorl Panel *Depending on the device to which connected, this function may not be available. Transparent mode In standby mode, press and hold the touch area of the earphones for two clicks, then release to enter transparent mode. The closing operation is the same as before. Restore factory settings Place the earphones into the charging case and quickly tap the earphone touch area three times. The red and white indicator lights of the earphones will stay on for one second at the same time, and there will be a voice prompt to turn on…

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(Lingyi Intelligent Technology (Shenzhen) Co., Ltd) (Jun. 29, 2023) 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:2BBVN-TH330) [Lingyi Intelligent Technology (Shenzhen) 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) Guozhan Liu (Lingyi Intelligent Technology (Shenzhen) Co., Ltd) (Jun. 29, 2023) 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:2BBVN-TH330) [Lingyi Intelligent Technology (Shenzhen) 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) Guozhan Liu

Lingyi Intelligent Technology (Shenzhen) Co., Ltd Model Difference Data：2023.06.29 Product description: True wireless Bluetooth earphones Model name: TH330, TH220PLUS, TH330PLUS, TH440 Trade Name: MIAOLO FCC ID: 2BBVN-TH330 All the model are the same circuit and RF module, except model names . Regards Sincerely Client’s signature : Client’s name / title : Guozhan Liu（manager） Contact information / address：Room 320, Huichao Building, No. 4008 Bao'an Avenue, Bao'an District, Shenzhen, Guangdong Province, China

Lingyi Intelligent Technology (Shenzhen) Co., Ltd (2023.06.29) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (True wireless Bluetooth earphones / TH330, TH220PLUS, TH330PLUS, TH440 / FCC ID: 2BBVN-TH330 ) 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 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 required to be submitted with this application be permanently withheld from public review. 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. Please contact me if there is any information you may need. Sincerely, Signature: Name: Guozhan Liu Title: manager

Lingyi Intelligent Technology (Shenzhen) Co., Ltd (2023.06.29) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen CTB Testing Technology 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, Signature: Name: Guozhan Liu Title: manager

External Photos

FCC ID LABEL: Label Location: FCC ID: 2BBVN-TH330

Internal Photos ANT ANT

Shenzhen CTB Testing Co., Ltd. FCC ID:2BBVN-TH330 Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR 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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. EDR: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 -0.556 0.88 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 -0.661 0.86 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 -0.096 0.98 0±1 1.00 1.26 <5 0.39651 3.00 YES 2.402 0.211 1.05 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 0.145 1.03 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 0.722 1.18 0±1 1.00 1.26 <5 0.39651 3.00 YES 2.402 0.693 1.17 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 0.592 1.15 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 1.106 1.29 1±1 2.00 1.58 <5 0.49918 3.00 YES GFSK π /4DQPSK 8DQPSK Conclusion: For the max result : 0.49918≤ FCC Limit 3.0 for 1g SAR.

深圳市恒祥通天线技术有限公司 深圳市恒祥通天线技术有限公司 深圳市恒祥通天线技术有限公司 Shenzhen Hengxiangtong Antenna Technology CO.,LTD Shenzhen Hengxiangtong Antenna Technology CO.,LTD Shenzhen Hengxiangtong Antenna Technology CO.,LTD Hengxiangtong Hengxiangtong Hengxiangtong R&D R&D R&D Department Department Department B623 Antenna passive efficiency 测试 员：陈锦元 日期：2023.6.1 He He He ngx ngx ngx iang iang iang tong tong tong R&D R&D R&D Department Department Department Machine placement R/L earphones (antenna facing up) are placed as shown in the following figure He He He ngx ngx ngx iang iang iang tong tong tong R&D R&D R&D Department Department Department R headphones Antenna passive efficiency and direction diagram He He He ngx ngx ngx iang iang iang tong tong tong R&D R&D R&D Department Department Department R headphones Antenna pattern He He He ngx ngx ngx iang iang iang tong tong tong R&D R&D R&D Department Department Department L Headphones Antenna passive efficiency and direction diagram He He He ngx ngx ngx iang iang iang tong tong tong R&D R&D R&D Department Department Department L Headphones Antenna pattern 深圳市恒祥通天线技术有限公司 深圳市恒祥通天线技术有限公司 深圳市恒祥通天线技术有限公司 Shenzhen Hengxiangtong Antenna Technology CO.,LTD Shenzhen Hengxiangtong Antenna Technology CO.,LTD Shenzhen Hengxiangtong Antenna Technology CO.,LTD Hengxiangtong Hengxiangtong Hengxiangtong R&D R&D R&D Department Department Department Antenna picture

Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB230616036RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 58 TEST REPORT Compiled by: Reviewed by: Approved by: Chen Zheng Arron Liu Bin Mei / Director Note: If there is any objection to the inspection results in this report, please submit a written report to the company within 15 days from the date of receiving the report. 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 CTB Testing Technology Co., Ltd. this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. “*” indicates the testing items were fulfilled by subcontracted lab. “#” indicates the items are not in CNAS accreditation scope. Product Name: True wireless Bluetooth earphones FCC ID: 2BBVN-TH330 Trademark: MIAOLO Model Number: TH330, TH220PLUS, TH330PLUS, TH440 Prepared For: Lingyi Intelligent Technology (Shenzhen) Co., Ltd Address: Room 320, Huichao Building, No. 4008 Bao'an Avenue, Bao'an District, Shenzhen, Guangdong Province, China Manufacturer: Lingyi Intelligent Technology (Shenzhen) Co., Ltd Address: Room 320, Huichao Building, No. 4008 Bao'an Avenue, Bao'an District, Shenzhen, Guangdong Province, China Prepared By: Shenzhen CTB Testing Technology Co., Ltd. Address: 1&2/F., Building A, No.26, Xinhe Road, Xinqiao, Xinqiao Street, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: Jun. 07, 2023 Sample tested Date: Jun. 07, 2023 to Jun. 16, 2023 Issue Date: Jun. 16, 2023 Report No.: CTB230616036RFX Test Standards FCC Part15.247 ANSI C63.10:2013 Test Results PASS Remark: This is Bluetooth radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB230616036RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 58 TABLE OF CONTENT Test Report Declaration Page 1. VERSION .......................................................................... 4 2. TEST SUMMARY ................................................................... 5 3. MEASUREMENT UNCERTAINTY ..................................................... 6 4. PRODUCT INFORMATION AND TEST SETUP .......................................... 7 4.1 Product Information .................................................................... 7 4.2 Test Setup Configuration ............................................................... 7 4.3 Support Equipment .................................................................... 7 4.4 Channel List .......................................................................... 8 4.5 Test Mode ............................................................................ 8 4.6 Test Environment ...................................................................... 8 5. TEST FACILITY AND TEST INSTRUMENT USED ....................................... 9 5.1 Test Facility ........................................................................... 9 5.2 Test Instrument Used .................................................................. 9 6. AC POWER LINE CONDUCTED EMISSION ............................................ 11 6.1 Block Diagram Of Test Setup .......................................................... 11 6.2 Limit ................................................................................ 11 6.3 Test procedure ....................................................................... 11 6.4 Test Result .......................................................................... 13 7. RADIATED SPURIOUS EMISSION ................................................... 15 7.1 Block Diagram Of Test Setup .......................................................... 15 7.2 Limit ................................................................................ 15 7.3 Test procedure ....................................................................... 16 7.4 Test Result .......................................................................... 17 8. BAND EDGE AND RF COUNDUCTED SPURIOUS EMISSIONS .......................... 26 8.1 Block Diagram Of Test Setup .......................................................... 26 8.2 Limit ................................................................................ 26 8.3 Test procedure ....................................................................... 26 8.4 Test Result .......................................................................... 27 9. COUDUCTED PEAK OUTPUT POWER ............................................... 34 9.1 Block Diagram Of Test Setup .......................................................... 34 9.2 Limit ................................................................................ 34 9.3 Test procedure ....................................................................... 34 9.4 Test Result .......................................................................... 35 10. 20DB OCCUPIED BANDWIDTH...................................................... 39 10.1 Block Diagram Of Test Setup ......................................................... 39 10.2 Limit ............................................................................... 39 10.3 Test procedure ...................................................................... 39 10.4 Test Result ......................................................................... 39 11. CARRIERFREQUENCIES SEPARATION .............................................. 43 11.1 Block Diagram Of Test Setup ......................................................... 43 11.2 Limit ............................................................................... 43 11.3 Test procedure ...................................................................... 43 11.4 Test Result ......................................................................... 43 12. HOPPING CHANNEL NUMBER ...................................................... 47 12.1 Block Di…

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Radiated Emission Below 1G Above 1G Conducted emissions