2BBXP-M28Bluetooth headset

Sports Bluetooth Earphone USER MANUAL Made in China NOTES! 1.Please read the manual carefully beforeusing the earphone,and operate strictly according to the requirements. 2.Please use standard charger to charge the earphone in case of causing battery damaged. 3.Please keep away from fire when using the earphone. 4.Please do not make the ports bloked,such as charging port,LED and earphone,etc. 5.Please don’t use the earphone at high volume or for a long time.Avoid affecting the user’s hearing. 6.Please do not disassemble the earphone for any reason. 7.Please do not clean the earphone with oil or other corrosive cleaning agents. 8.Please do not use the earphone in potentially dangerous places. SPECIFICATIONS Product name: Bluetooth Earphone Bluetooth version:V5.3Battery capacity:110mAh Driver Unit:10mmCharging time:1H Sensitivity:98±3dBWorking range:10M Bluetooth protocol:A2DPHFPHSPAVRCP ACCESSORIES Bluetooth earphone*1 User manual*1 Type-c charging cable*1 Red light ChargingFully Charged Blue light QUICK PAIRING First Step Long press function button to turn on until the red and blue light flash alternately,it gets into pairing mode. Second Step Open the bluetooth device from mobile phone, and searching the pairing name “M28”to pair. Others Pairing The earphone will auto connect with mobile phone if already connected last time. BUTTON FUNCTIONS Click“ ”function button 1.Anwser 3.Play music Click“ ”button Next song Last song Click“ ”button Long press“ ”button Volume up Volume down Long press“ ”button Long press“”function button CHARGING Long press 3s:Power on Long press 5s:Power off A call coming in:Long press 2s to reject 2.Hang up 4.Pause music BUTTON FUNCTIONS ICON 2 1 3 Volume up / Next song Volume down / Last song Power on / Power off Hang on / Hang off Play music / Pause music 1 1 23 2 3 1 Warninn Data Safety Informa 1. To ensure your personal safety, do not wear or place the headset too close to the pacemaker position (less than 10CM). 2. Do not plug into the power socket. 3. The device should be used by children under adult supervision. The product is not a toy. 4. Using headphones at high volumes,especially for long time,maybe it can cause damage to your hearing. 5. Operating a hi-fi switch or plugging in a headset may produce a shrill sound at high volume setting may affect your listening. Therefore,please volume down before switching between various audio sources or inserting headphones. 6. For traffic safety, do not use headphones while driving or cycling 7. Please keep the product at an appropriate temperature between -10°C and 55°C. 1. If the battery is not properly replaced, there will be explosion risk.Please only replace the battery with the same type or equivalent type. 2. For removable battery products, batteries must be recycled or properly disposed,for non-removable batteries disassembling is prohibited. 3. Do not disassemble, bump, squeeze or throw the battery into the fire. Do not expose the battery to conductive materials,in liquid, fire, or heat. 4. Keep metal objects away from the battery's poles.Please don’t continue to use if the battery appears to swell, leak, discolor,odor or any other abnormality. 5. Do not use if the battery is immersed into water. 6. If improperly used, batteries could be explode or leak, causing burns and other injuries harm; If batteries leak,please take care and follow local battery disposal laws and regulations to discard batteries. 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. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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 the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction

Dongguan Gen.M Intelligent Technology Co., Ltd Model Difference Data：2023.07.05 Product description: Bluetooth headset Model name: M28, M29, M23, M21, M25, M30, K21, K25, K19 Trade Name:N/A FCC ID: 2BBXP-M28 All the model are the same circuit and RF module, except model names . Regards Sincerely Client’s signature : Client’s name / title : Lu Huiguang（Manager） Contact information / address：No.177, Dongyuan Avenue, Shipai Town, Dongguan City, Guangdong Province, China

Dongguan Gen.M Intelligent Technology Co., Ltd (2023.07.05) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Bluetooth headset / M28, M29, M23, M21, M25, M30, K21, K25, K19/ FCC ID: 2BBXP-M28) 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: Lu Huiguang Title: Manager

Dongguan Gen.M Intelligent Technology Co., Ltd (2023.07.05) 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: Lu Huiguang Title: Manager

External Photos

FCC ID LABEL: Label Location: FCC ID: 2BBXP-M28 Model No.: M28

Internal Photos ANT

Shenzhen CTB Testing Co., Ltd. FCC ID:2BBXP-M28 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 -0.657 0.86 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 -0.768 0.84 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 -0.198 0.96 0±1 1.00 1.26 <5 0.39651 3.00 YES 2.402 0.203 1.05 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 0.093 1.02 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 0.634 1.16 0±1 1.00 1.26 <5 0.39651 3.00 YES 2.402 0.565 1.14 0±1 1.00 1.26 <5 0.39023 3.00 YES 2.441 0.481 1.12 0±1 1.00 1.26 <5 0.39338 3.00 YES 2.480 1.061 1.28 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.

Inverted F Antenna Specification Summary ITEMANT SPEC Model Name 2.4G ANT HorizontalVertical 2400MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Center Frequency -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dB PolarizationHorizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance50 Ohm Antenna Length 38.20mm Antenna Photo & Length (mm) Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain (dB) Frequency (MHz) MaxMinAvg 2400-5.2537-22.1424-12.4294 2450-2.4652-24.5837-10.4702 2500-1.86120-29.5214-9.20432 Manufacturer:Dongguan Gen.M Intelligent Tech nology Co., Ltd Address:No.177, Dongyuan Avenue, Shipai Town, Dongguan City, Guangdong Province, China

Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB230703035RFX 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: Bluetooth headset FCC ID: 2BBXP-M28 Trademark: N/A Model Number: M28, M29, M23, M21, M25, M30, K21, K25, K19 Prepared For: Dongguan Gen.M Intelligent Technology Co., Ltd Address: No.177, Dongyuan Avenue, Shipai Town, Dongguan City, Guangdong Province, China Manufacturer: Dongguan Gen.M Intelligent Technology Co., Ltd Address: No.177, Dongyuan Avenue, Shipai Town, Dongguan City, 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. 29, 2023 Sample tested Date: Jun. 29, 2023 to Jul. 03, 2023 Issue Date: Jul. 03, 2023 Report No.: CTB230703035RFX 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.:CTB230703035RFX 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 Diagram Of Test Setup ......................................................... 47 1…

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Radiated Emission Below 1G Above 1G Conducted emissions