2ATOY-RT26True Wireless Earbuds

RT26 Charging for the earbuds: Please fully charge before first use. Place the earbuds into the case as they will charge automatically by the magnet. The LED light of earbuds will turn solid red, Once charging is complete, LED lights of earbuds will turn solid white for 1min then turn off. Charging time: around 2hours Playing time: around 7.5hours Charge your charging station: Plug the provided Type-C charging cable into the bottom of charging station, the bottom LED light will flash white. When charging is complete, the bottom LED and inside 4 LED turn solid white. LED1 light up white= battery 25%-5% LED1,LED2 light up white =battery 50%-25% LED1,LED2, LED3 light up white=battery 75%-50% LED1,LED2,LED3,LED4 light up white=battery 100%-75% Charging time: 2hoursCharging time: 2 hours Pairing: Take out both earbuds from the charging case, the earbuds LED will flash white thrice, They will begin auto-pairing with each other. You will hear a prompt sound to confirm successful pairing. The one earbud LED will flash red and white, the other flash white twice per 5s. Connect to your device Activate the Bluetooth function on your device to search for “RT26” and connect it. You will hear a prompt from both earbuds, Both earbuds LED lighting white for 2s. It is ready to use. Each earbud can be used independently. Multi-function Touch control Touch right or left earbuds 2 times：Answer an incoming call/ End an ongoing call Keep touching right or left earbuds for 2 seconds: reject a call Keep touching right or left earbuds for 5 seconds until you hear a prompt: activate the voice assistant (Siri or Google assistant) Listening to Music: Touch left or right earbuds 2 times: Play/Pause Touch right earbuds 3 times: Next song Touch left earbuds 3 times: Previous song (PS：Reset button on backside of charging case, press the button 6s to restore settings.) Power off 1.Put the earbuds back in the charging case and it will be power off and charged automatically. 2.Keep touching 8s 3.Without connecting any device for 5mins, it will be power off automatically. LED turns red for 1s while earbuds power off. What is in the box? -Bluetooth earbuds -Charging case -Type-C cable -S,M,L 3 sizes silicon earplugs. Product’s specification Bluetooth version：5.3 Power output：3mW Speaker size：D6mm*2 Frequency response: 20HZ-20KHZ Battery built-in earpiece: 50mAh*2 Charging station battery: 600mAh 3.7V Charging current for charging station: 400mA DC5V FCC ID: 2ATOY-RT26 Charging for the earbuds: Plug the provided Type-C charging cable into the bottom of charging station, the bottom LED light will flash white. When charging is complete, the bottom LED and inside 4 LED turn solid white. LED1 light up white= battery 25%-5% LED1,LED2 light up white =battery 50%-25% LED1,LED2, LED3 light up white=battery 75%-50% LED1,LED2,LED3,LED4 light up white=battery 100%-75% Charging time: 2hoursCharging time: 2 hours Please fully charge before first use. Place the earbuds into the case as they will charge automatically by the magnet. The LED light of earbuds will turn solid red, Once charging is complete, LED lights of earbuds will turn solid white for 1min then turn off. Charging time: around 2hours Playing time: around 7.5hours Charge your charging station: Take out both earbuds from the charging case, the earbuds LED will flash white thrice, They will begin auto-pairing with each other. You will hear a prompt sound to confirm successful pairing. The one earbud LED will flash red and white, the other flash white twice per 5s. Pairing: Connect to your device Activate the Bluetooth function on your device to search for “RT26” and connect it. You will hear a prompt from both earbuds, Both earbuds LED lighting white for 2s. It is ready to use. Each earbud can be used independently. Touch right or left earbuds 2 timesAnswer an incoming call/ End an ongoing call Keep touching right or left earbuds for 2 seconds: reject a call Keep touching right or left earbuds for 5 seconds until you hear a prompt: activate the voice assistant (Siri or Google assistant) Multi-function Touch control Touch left or right earbuds 2 times: Play/Pause Touch right earbuds 3 times: Next song Touch left earbuds 3 times: Previous song (PSReset button on backside of charging case, press the button 6s to restore settings.) Listening to Music: 1.Put the earbuds back in the charging case and it will be power off and charged automatically. 2.Keep touching 8s 3.Without connecting any device for 5mins, it will be power off automatically. LED turns red for 1s while earbuds power off. Power off Bluetooth version5.3 Power output3mW Speaker sizeD6mm*2 Frequency response: 20HZ-20KHZ Battery built-in earpiece: 50mAh*2 Charging station battery: 600mAh 3.7V Charging current for charging station: 400mA DC5V Product’s specification FCC COMPLIANCE STATEMENT: -Bluetooth earbuds -Charging case -Type-C cable -S,M,L 3 sizes silicon earplugs. What is in the box? RT26 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply with the limits for a Class B digital 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 t…

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Dongguan Fulun Electronics Co.,Limited 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd,Tangxia, Dongguan, China Declaration letter Dear Sir, We, Dongguan Fulun Electronics Co.,Limited declare product: True Wireless Earbuds with the model numbers RT26, RT26B. The product is a pair of TWS earphone, and it included two parts(left and right), and both of two parts have the same electrical mechanical and physical construction, their different is PCB layout. Please kindly handle on the project. FCC ID: 2ATOY-RT26 Thank you! Sincerely, Signature: Name: Bessie Luo Title: Sales Manager

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Dongguan Fulun Electronics Co.,Limited Address: 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd,Tangxia, Dongguan, China Product Name: True Wireless Earbuds Model Number: RT26, RT26B FCC Identifier: 2ATOY-RT26 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: Bessie Luo Date: 12/13/2022 Title: Sales Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 Dongguan Fulun Electronics Co.,Limited Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 12/13/2022 Subject: Request for Confidentiality FCC ID: 2ATOY-RT26 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, Signature: Name: Bessie Luo Title: Sales Manager

FCC ID: 2ATOY-RT26 External photos FCC ID: 2ATOY-RT26 FCC ID: 2ATOY-RT26 FCC ID: 2ATOY-RT26 FCC ID: 2ATOY-RT26

Label & location The device is so small, so the FCC ID number is on User manual and package.

FCC ID: 2ATOY-RT26 Internal photos FCC ID: 2ATOY-RT26 RF Antenna FCC ID: 2ATOY-RT26 RF Chip FCC ID: 2ATOY-RT26 RF Antenna FCC ID: 2ATOY-RT26 RF Chip FCC ID: 2ATOY-RT26 FCC ID: 2ATOY-RT26

Dongguan Nore Testing Center Co., Ltd. Report No.: NTC2211508F-1 FCC ID: 2ATOY-RT26 RF EXPOSURE EVALUATION EUT Specification EUT True Wireless Earbuds Frequency band (Operating) WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz WLAN: 5.745GHz ~ 5825GHz Others(Bluetooth: 2.402GHz ~ 2.480GHz) Device category Portable (<20cm separation) Mobile (>20cm separation) Others ___ Antenna diversity Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity Max. output power -1.736dBm (0.67mW) Antenna gain 3.19dBi Evaluation applied MPE Evaluation SAR Evaluation Standard Requirement Portable Device According to §15.247(i) and §1.1307b(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 levels in excess of the Commission’s guidelines. See KDB 447498 D01 General RF Exposure Guidance v06, section 4.3.1. 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, 16 where ·f(GHz) is the RF channel transmit frequency in GHz ·Power and distance are rounded to the nearest mW and mm before calculation17 ·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. Dongguan Nore Testing Center Co., Ltd. Report No.: NTC2211508F-1 FCC ID: 2ATOY-RT26 Measurement Result Channel Channel Frequency (MHz) Max Output power (dBm) Max Output power (mW) Calculati on Value (Note 1) Threshold Value GFSK Low 2402 -4.395 0.3635 0.1127 3.0 Middle 2441 -5.217 0.3008 0.0940 3.0 High 2480 -5.215 0.3010 0.0948 3.0 π/4-DQPSK Low 2402 -2.283 0.5912 0.1832 3.0 Middle 2441 -3.053 0.4951 0.1547 3.0 High 2480 -3.087 0.4912 0.1547 3.0 8DPSK Low 2402 -1.736 0.6705 0.2078 3.0 Middle 2441 -2.476 0.5655 0.1767 3.0 High 2480 -2.542 0.5569 0.1754 3.0 Note 1: Calculation Value =[(max. power of channel, mW)/(min. test separation distance, mm)] ·[√f(GHz)]. Fox example: 0.6705/5*√2.402=0.2078 ≤ 3.0 According to KDB447498 D01 V06, threshold at which no SAR required is ≤3.0 for 1-g SAR, separation distance is 5mm, and no simultaneous SAR measurement is required.

Dongguan Nore Testing Center Co., Ltd. Report No.: NTC2211508F-2 FCC ID: 2ATOY-RT26 RF EXPOSURE EVALUATION EUT Specification EUT True Wireless Earbuds Frequency band (Operating) WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz WLAN: 5.745GHz ~ 5825GHz Others(Bluetooth: 2.402GHz ~ 2.480GHz) Device category Portable (<20cm separation) Mobile (>20cm separation) Others ___ Antenna diversity Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity Max. output power -1.549dBm (0.70mW) Antenna gain 3.19dBi Evaluation applied MPE Evaluation SAR Evaluation Standard Requirement Portable Device According to §15.247(i) and §1.1307b(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 levels in excess of the Commission’s guidelines. See KDB 447498 D01 General RF Exposure Guidance v06, section 4.3.1. 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, 16 where ·f(GHz) is the RF channel transmit frequency in GHz ·Power and distance are rounded to the nearest mW and mm before calculation17 ·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. Dongguan Nore Testing Center Co., Ltd. Report No.: NTC2211508F-2 FCC ID: 2ATOY-RT26 Measurement Result Channel Channel Frequency (MHz) Max Output power (dBm) Max Output power (mW) Calculati on Value (Note 1) Threshold Value GFSK Low 2402 -4.248 0.3760 0.1165 3.0 Middle 2441 -4.862 0.3264 0.1020 3.0 High 2480 -4.531 0.3523 0.1110 3.0 π/4-DQPSK Low 2402 -2.079 0.6196 0.1921 3.0 Middle 2441 -2.768 0.5287 0.1652 3.0 High 2480 -2.466 0.5668 0.1785 3.0 8DPSK Low 2402 -1.549 0.7000 0.2170 3.0 Middle 2441 -2.236 0.5976 0.1867 3.0 High 2480 -1.884 0.6480 0.2041 3.0 Note 1: Calculation Value =[(max. power of channel, mW)/(min. test separation distance, mm)] ·[√f(GHz)]. Fox example: 0.700/5*√2.402=0.2170 ≤ 3.0 According to KDB447498 D01 V06, threshold at which no SAR required is ≤3.0 for 1-g SAR, separation distance is 5mm, and no simultaneous SAR measurement is required.

客户签名： 产品规格说明书 PRODUCT SPECIFICATION 日期: 产品名称： RT26 PRODUCT NAME 产品编码： RT26 PRODUCT NUMBER 客户编码： RD CUSTOMER NUMBER 编 写： 曾庆雄 校 对： 曾庆雄 批 准： 张强 日 期 : 2022.9.14 深圳恒信达通信科技有限公司 SHENZHEN HXD COMMUNICATION TECH CO.,LTD. TEL:0755-61123122 FAX:0755-61123480 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 电 气 性 能 1. 带宽 2.402GHz ~2.480GHz 2. 输入阻抗 50Ω 3. VSWR 与指定的样机装配时，自然放置进行测定。 2.402GHz ~2.480GHz 1.5以下 4.GAIN 2.402GHz ~2.480GHz 测试方法： (一) 将待测天线(DUT)装配在指定的样机上。 (二) 用50Ω同轴电缆连接测试件上的测试点和网络分析仪，测试电缆 上加装磁环，以减少感应电流的影响。 (三) 将样机放在高度为 20 cm的支架上，测试OPEN或CLOSE时的VSWR。 (四). 按下图装设测试电路。 (五) . 测试环境无特别规定。（周围无较大金属物，在常温常湿中进行 ) 4. 容许功率 1W 5. 工作温度范围 -25~+65°C 6. 保存温度范围 -40~+85 °C 网络分析仪 样机 支撑架 同轴电缆 GAIN=3.19dBi(Max) 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 BLUE TOOTH ANTENNA 匹配电路 匹配说明E10R E22NH E30R 左右共匹配 天线形态 单极FPC天线 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 RETURN LOSS 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 Y-Z PLANE 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 X-Y PLANE 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 X-Z PLANE 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0 天 线 规 格 书 品 名 RT26 机 型 蓝牙耳机 文件编号(Doc. No.)：SPEC-001 版次(Rev.)：1.0

Report No.: NTC2211508FV00 Page 2 of 68 Table of Contents 1. Summary of Test Result ........................................................................................................................... 4 2. General Description of EUT ...................................................................................................................... 5 3. Test Channels and Modes Detail ............................................................................................................... 8 4. Configuration of EUT ................................................................................................................................ 8 5. Modification of EUT .................................................................................................................................. 8 6. Description of Support Device ................................................................................................................... 9 7. Test Facility and Location ....................................................................................................................... 10 8. Applicable Standards and References ..................................................................................................... 11 9. Deviations and Abnormalities from Standard Conditions ........................................................................... 11 10. Test Conditions .................................................................................................................................... 12 11. Measurement Uncertainty ..................................................................................................................... 13 12. Sample Calculations ............................................................................................................................. 14 13. Test Items and Results ......................................................................................................................... 15 13.1 Conducted Emissions Measurement .................................................................................................... 15 13.2 Radiated Spurious Emissions and Restricted Bands Measurement ....................................................... 17 13.3 Channel Separation test ...................................................................................................................... 27 13.4 20dB Bandwidth ................................................................................................................................. 34 13.5 Hopping Channel Number ................................................................................................................... 41 13.6 Time of Occupancy (Dwell Time) ......................................................................................................... 44 13.7 Maximum Peak Output Power ............................................................................................................. 51 13.8 Band Edge Conducted Spurious Emission Measurement ...................................................................... 58 13.9 Antenna Requirement ......................................................................................................................... 63 14. Test Equipment List .............................................................................................................................. 68 Report No.: NTC2211508FV00 Page 3 of 68 Revision History Report Number Description Issued Date NTC2211508FV00 Initial Issue 2022-12-13 Report No.: NTC2211508FV00 Page 4 of 68 1. Summary of Test Result FCC Rules Description of Test Result Remarks §15.247(a)(1) Channel Separation test PASS --- §15.247(a)(1) 20dB Bandwidth PASS --- §15.247(a)(1)(iii) Hopping Channel Number PASS --- §15.247(a)(1)(iii) Time of Occupancy (Dwell Time) PASS --- §15.247(b) Max Peak output Power test PASS --- §15.247(d) Band edge test PASS --- §15.207 (a) AC Power Conducted Emission N/A --- §15.247(d),§15.209, §15.205 Radiated Emission PASS --- §15.203 Antenna Requirement PASS --- §15.247(d) Conducted Spurious Emission PASS --- Report No.: NTC2211508FV00 Page 5 of 68 2. General Description of EUT Product Information Product Name: True Wireless Earbuds Main Model Name: RT26 Additional Model Name: RT26B Model Difference: Both of models have the same circuit schematic, construction, PCB Layout and critical components. Their difference is model number due to trading purpose. S/N: 2211-6824 Brand Name BarbetSound Hardware Version: V01 Software Version: V01 Rating: DC 3.7V Lithium-ion battery for each earphone Classification: Class B Typical Arrangement: Table-top I/O Port: Refer to the user manual Accessories Information Adapter: N/A Cable: N/A Other: N/A Report No.: NTC2211508FV00 Page 6 of 68 Additional Information Note: 1.According to the model difference, all tests were performed on model RT26 2.The EUT is a pair of TWS earphone, and it included two parts(left and right), and both of two parts have the same electrical mechanical and physical construction, their different is PCB layout. 3.According to the above information, we prepare left earphone and right earphone to perform all test items. Remark: All the information above are provided by the manufacturer. More detailed feature of the EUT please refers to the user manual. Technical Specification Bluetooth Version: V5.3 Frequency Range: 2402-2480MHz Modulation Type: GFSK, π/4-DQPSK, 8DPSK Number of Channel: 79 (refer to following channel list for details) Channel Space: 1MHz Antenna Type: FPC Antenna for each earphone Antenna Gain: 3.19 dBi for each earphone (Declared by the manufacturer) The EUT does not support Bluetooth Low Energy feature in accordance with the manufacturer declaration. Report No.: NTC2211508FV00 Page 7 of 68 Channel List Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 0 2402 20 2422 40 2442 60 2462 1 2403 21 2…

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FCC ID: 2ATOY-RT26 Test Photo Radiated emission (Below 30MHz) Radiated emission (30-1000MHz) FCC ID: 2ATOY-RT26 Radiated emission (Above 1000MHz)