2AIXNBS301RKTWS Bluetooth Headset

BS301RK TWS Bluetooth Headset User Manual 1Charging Base Type-C 2Charing Base Indicator 3）Headset Indicator & Mic Hole 4）Speaker 5）Touch Panel Step ② Slightly rotate headset until firm Step ③ Make the headset to cochlear edge tightly Type-C charging port Use the Type-C cable to connect with computer Use the Type-C cable to connect with mobile phone charger Headset (R)Headset (L) Erect headset and place them into the cochlea Wear the headset (R) and headset (L) respectively 3 5 1 2 4 Please use Type-C to charge. The indicator will stop flashing after being fully charged. Specifications *The time mentioned above may vary due to user's operation mode and device settings. Bluetooth Version Bluetooth Profiles Supported Audio Decoding Protocol Transmission Power Operation Range Frequency Range Battery of Headset Charging Voltage of Headset Charging Time of Headset Battery of Base Charging Voltage of Base Charging Time of Base Charging Headset Times from Charging Base Music Playing Time Talk Time Standby Time Driver Driver sensitivity Driver impedance Driver frequency ring range Dimensions of Charging Base(mm) Dimensions of Headset(mm) Weight(one headset) Total Weight V5.0 HFP, HSP, A2DP, AVRCP SBC, AAC, APTX,CVC Class 2 Up to 10 meters 2.4GHz-2.48GHz 40mAH Li-polymer Battery DC 5V±0.2V About 1.5 hours 400mAH Li-polymer Battery DC 4.5 V-6.0 V About 1.5 hours About 2-3 times ≥ 4.5 hours ≥ 5 hours ≥ 100 hours φ10mm 93±3dB (1KHz) 16Ω±15 20Hz-20KHz L51.5×W51.5×H21.1 L43.1×W16.6×H17.2 About 3.4 g About 37.2 g To Know Your Headsets Step ① How To Wear: How To Charge The Headset The indicator is white when being charged, will turn off automatically after being fully charged. Note: When the battery power is lower than 10%, the headset will remind you of “low battery please charge” every 60 seconds. How To Charge The Charging Base Turning ON/OFF Method Pick up the headsets from the charging base to turn on automatically. Put them back to power off and charge the headsets. Method Status No. Status No. Status StatusCharging Base Performance Headset Performance 1 1 2 2 3 5 4 TWS Pairing Mode Headset Charging Power Off Headset Indicator The indicator flashes white quickly Power On The indicator is white when being charged, will turn off automatically after being fully charged. Touch the touch panel of headset(R) or headset(L) for 2 seconds to turn on. Touch the touch panel of headset(R) or headset(L) for 5 seconds to turn off. Bluetooth headset should be used with the compatible devices which support Bluetooth wireless technology. This allows you to make two calls and enjoy the music streaming at any time freely.Please read this user manual carefully before using the headset, and also read your device’s user manual regarding the Bluetooth function, and pay attention to those important safety and maintenance information. Please keep the headset away from children. Put the headset (L) (R) to the corresponding position in the bottom of the charging base. Check the charging device is suitable for the headset or not. Use only the supplied charger to charge the headset, if use other device may violate the validation or the maintenance article of this product and may cause danger. Do not attempt to force open the built-in battery as this could damage the headset. A fully charged headset will loseits power automatically if left unused. It is recommended to charge the headset every three months. Do not leave the headset in a too hot or too cold condition (best between -10 and 50) which may affect the headset's operations although it is fully charged. Do not dispose of the headset into fire or water. Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Charging Base Indicator Ready for pairing to phone After TWS paired,right headset flashes white slowly, left headset flashes white once each 5 seconds. The indicator flashes white for 3 times. The indicator flashes white for 3 times Charging Working 1.When using USB to charge, the indicator flashes red 2.The indicator will stop flashing after being fully charged 3.The indicator will turn off if it is not charging Note: Please charge the base and headsets before usage The indicator light flashes red each 2 seconds, once means 0%-25% battery, twice means 25%-50%, 3 times means 50%-75%, 4 times means75%-100% Bluetooth ON Connect BS301RK 2s Tap the touch panel of headset(R) or headset(L) to play music. Double tap the touch panel of headset(R) to pause music. TWS Pairing TWS Reconnection Answer /End a Call 1. Answer a call: When call incoming, tap the touch panel of headset (R) or headset (L). If the headsets reconnect to the phone, the call will be answered too. 2.End a call: Touch the touch panel of headset (R) or headset (L) for about 2 seconds or put one of headsets into charging base. Reject a call Touch the touch panel of headset(R) or headset(L) for about 2 seconds or put one of headsets into charging base, the call will be rejected. Double tap on the headset(L) to activate the voice assistant function(Siri, Google assistant, etc.), double tap to turn it off. Note: This feature only supports phones with voice assistant function. Voice Assistant Music Playing/Pause Master-slave switching Volume +/- Next/Previous Track When play music, tap the touch panel of headset(R) for volume up , headset(L) for volume down. Note: You will hear ringtone notice when reach highest or lowest volume Reset Touch the touch panel of headsets for about 8 seconds, then double tap quickly in 1 second to reset. Voice Notice: 1.Touch the headsets for about 8 seconds - “DingDingDing”. 2.Double tap headsets - “Ding” . The indictor flashing white quickly 3.The headsets turn on - “Power on”. The indicator flashes white for 3 times. Maintenance Do not use abrasive cleaning solvents to clean the headset. Do not allow the headset to touch with any sharp objects as this will cause scratching and damages. Please keep headset away from high-temperature, humidity and dust. • • • Note: 1. The TWS pairing period…

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Agent Authorization Company: GUANGZHOU U&I TECHNOLOGY COMPANY LIMITED Address: 4th Floor, 15th Building, Vtrek Innovation Industrial Park, No. 644 Shibei Road, Panyu District, Guangzhou, China Product Name: TWS Bluetooth Headset Model Number(s): BS301RK, BS253RK, BS246RK, BS274RK, BS274RK-2, BS302RK Product Description: TWS Bluetooth Headset We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2020-05-06 Name: Paul He Company: GUANGZHOU U&I TECHNOLOGY COMPANY LIMITED

May 14, 2020 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject: Explanation of differences between product types FCC ID : 2AIXNBS301RK Model Number: BS301RK, BS253RK, BS246RK, BS274RK, BS274RK-2, BS302RK To Whom It May Concern: We, The GUANGZHOU U&I TECHNOLOGY COMPANY LIMITED hereby declare that the model : BS253RK, BS246RK, BS274RK, BS274RK-2, BS302RK is identical with the model : BS301RK, except the model name. Except for the different above, no other modification is performed. Sincerely, Signature: Signature: Name: Paul He

Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2020-05-06 Subject; Request for Confidentiality FCC ID: 2AIXNBS301RK To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Paul He

External Photos ALL VIEW OF EUT TOP VIEW OF EUT BOTTOM VIEW OF EUT FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT VIEW OF EUT(PORT)-left

FCC ID Label Location Size: 6mm*14mm FCC ID: 2AIXNBS301RK

Internal Photos OPEN VIEW OF EUT INTERNAL VIEW-1 OF EUT INTERNAL VIEW-2 OF EUT VIEW OF BATTERY Antenna VIEW OF EUT(PORT)-right OPEN VIEW OF EUT INTERNAL VIEW-1 OF EUT INTERNAL VIEW-2 OF EUT Antenna VIEW OF BATTERY

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description TWS Bluetooth Headset Model Name BS301RK, BS253RK, BS246RK, BS274RK, BS274RK-2, BS302RK FCC ID 2AIXNBS301RK 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v05 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 3. CALCULATION P t =8.699dBm=7.41mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(7.41mW /5mm) .[√2.48(GHz)]= 2.33<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 65 FCC Test Report Report No.: AGC01082200401FE03 FCC ID : 2AIXNBS301RK APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : TWS Bluetooth Headset BRAND NAME : U&I MODEL NAME : BS301RK, BS253RK, BS246RK, BS274RK, BS274RK-2, BS302RK APPLICANT : GUANGZHOU U&I TECHNOLOGY COMPANY LIMITED DATE OF ISSUE : Apr. 28, 2020 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd CAUTION: This report shall not be reproduced except in full without the written permission of the test laboratory and shall not be quoted out of context. Report No.: AGC01082200401FE03 Page 2 of 65 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Apr. 28, 2020 Valid Initial Release Report No.: AGC01082200401FE03 Page 3 of 65 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY ............................................................................................................... 5 2. GENERAL INFORMATION ............................................................................................................................ 6 2.1. PRODUCT DESCRIPTION ..................................................................................................................... 6 2.2. TABLE OF CARRIER FREQUENCYS ..................................................................................................... 6 2.3. RECEIVER INPUT BANDWIDTH ............................................................................................................ 7 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE ....................................................................... 7 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ........................................................ 7 2.6. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................. 8 2.7. TEST METHODOLOGY .......................................................................................................................... 8 2.8. SPECIAL ACCESSORIES ....................................................................................................................... 8 2.9. EQUIPMENT MODIFICATIONS .............................................................................................................. 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................. 9 4. DESCRIPTION OF TEST MODES ............................................................................................................... 10 5. SYSTEM TEST CONFIGURATION ............................................................................................................. 11 5.1. CONFIGURATION OF EUT SYSTEM .................................................................................................... 11 5.2 EQUIPMENT USED IN TESTED SYSTEM .............................................................................................. 11 5.3. SUMMARY OF TEST RESULTS ............................................................................................................. 11 6. TEST FACILITY ........................................................................................................................................... 12 7. PEAK OUTPUT POWER ............................................................................................................................. 13 7.1. MEASUREMENT PROCEDURE ........................................................................................................... 13 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 13 7.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 14 8. 20DB BANDWIDTH ..................................................................................................................................... 20 8.1. MEASUREMENT PROCEDURE ........................................................................................................... 20 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 20 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................. 20 9. CONDUCTED SPURIOUS EMISSION ........................................................................................................ 27 9.1. MEASUREMENT PROCEDURE ........................................................................................................... 27 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 27 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................. 27 Report No.: AGC01082200401FE03 Page 4 of 65 9.4. LIMITS AND MEASUREMENT RESULT ............................................................................................... 27 10. RADIATED EMISSION ............................................................................................................................... 37 10.1. MEASUREMENT PROCEDURE ......................................................................................................... 37 10.2. TEST SETUP ....................................................................................................................................... 39 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................. 40 10.4. TEST RESULT ..................................................................................................................................... 40 11. NUMBER OF HOPPING FREQUENCY ..................................................................................…

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Report No.: AGC01082200401FE03 Page 45 of 65 EUT TWS Bluetooth Headset Model Name BS301RK Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Horizontal FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) 4960.022 4960.022 7440.033 7440.033 Value Type 52.910.22 44.280.22 45.072.64 38.222.64 53.1374-20.87 peak 44.554-9.5 AVG 47.7174-26.29 peak 40.8654-13.14 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT TWS Bluetooth Headset Model Name BS301RK Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Vertical FrequencyMeter ReadingFactor Emission LevelLimitsMargin (MHz)(dBμV) (dB)(dBμV/m)(dBμV/m)(dB) 4960.022 4960.022 7440.033 7440.033 Value Type 50.190.22 41.830.22 42.442.64 35.472.64 50.4174-23.59 peak 42.0554-11.95 AVG 45.0874-28.92 peak 38.1154-15.89 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. RESULT: PASS Note: Other emissions from 1G to 25 GHz are considered as ambient noise. No recording in the test report. Factor = Antenna Factor + Cable loss - Amplifier gain, Over=Measure-Limit. The “Factor” value can be calculated automatically by software of measurement system. All test modes had been tested. The GFSK modulation is the worst case and recorded in the report. Report No.: AGC01082200401FE03 Page 46 of 65 TEST RESULT FOR RESTRICTED BANDS REQUIREMENTS EUT TWS Bluetooth Headset Model Name BS301RK Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 1 Antenna Horizontal PK AV RESULT: PASS Report No.: AGC01082200401FE03 Page 47 of 65 EUT TWS Bluetooth Headset Model Name BS301RK Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 1 Antenna Vertical PK AV RESULT: PASS Report No.: AGC01082200401FE03 Page 48 of 65 EUT TWS Bluetooth Headset Model Name BS301RK Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Horizontal PK AV RESULT: PASS Report No.: AGC01082200401FE03 Page 49 of 65 EUT TWS Bluetooth Headset Model Name BS301RK Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Vertical PK AV RESULT: PASS Note: The factor had been edited in the “Input Correction” of the Spectrum Analyzer. So the Amplitude of test plots is equal to Reading level plus the Factor in dB. Use the A dB(μV) to represent the Amplitude. Use the F dB(μV/m) to represent the Field Strength. So A=F. All test modes had been pre-tested. The GFSK modulation is the worst case and recorded in the report. Report No.: AGC01082200401FE03 Page 50 of 65 11. NUMBER OF HOPPING FREQUENCY 11.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: The frequency band of operation. Depending on the number of channels the device supports, it may be necessary to divide the frequency range of operation across multiple spans, to allow the individual channels to be clearly seen. 2. RBW: To identify clearly the individual channels, set the RBW to less than 30% of the channel spacing or the 20 dB bandwidth, whichever is smaller. 3. VBW ≥ RBW. Sweep: Auto. Detector function: Peak. Trace: Max hold. 4. Allow the trace to stabilize. 11.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 8.2 11.3. MEASUREMENT EQUIPMENT USED The same as described in section 6 11.4. LIMITS AND MEASUREMENT RESULT TOTAL NO. OF HOPPING CHANNEL LIMIT (NO. OF CH) MEASUREMENT (NO. OF CH) RESULT >=15 79 PASS TEST PLOT FOR NO. OF TOTAL CHANNELS Note: The GFSK modulation is the worst case and recorded in the report. Report No.: AGC01082200401FE03 Page 51 of 65 12. TIME OF OCCUPANCY (DWELL TIME) 12.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Zero span, centered on a hopping channel. 2. RBW shall be≤channel spacing and where possible RBW should be set >> 1 / T, where T is the expected dwell time per channel. 3. Sweep: As necessary to capture the entire dwell time per hopping channel; where possible use a video trigger and trigger delay so that the transmitted signal starts a little to the right of the start of the plot. The trigger level might need slight adjustment to prevent triggering when the system hops on an adjacent channel; a second plot might be needed with a longer sweep time to show two successive hops on a channel. 4. Detector function: Peak. Trace: Max hold. 5. Use the marker-delta function to determine the transmit time per hop. 6. Repeat the measurement using a longer sweep time to determine the number of hops over the period specified in the requirements. The sweep time shall be equal to, or less than, the period specified in the requirements. Determine the number of hops over the sweep time and calculate the total number of hops in the period specified in the requirements, using the following equation: (Number of hops in the period specified in the requirements) = (number of hops on spectrum analyzer) × (period specified in the requirements / analyzer sweep time) 7. The average time of occupancy is calculated from the transmit time per hop multiplied by the number of hops in the period specified in the requirements. 12.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 8.2 12.3. MEASUREMENT EQUIPMENT USED The same as described in section 6 12.4. LIMITS AND MEASUREMENT RESULT Channel Time of Pulse for DH5 (ms) Number of hops in the period specified in the requirements Sweep Time (ms) Limit (ms) Low 2.893 27*4 312.44 400 Middle 2.899 27*4 313.09 400 High 2.895 27*4 312.66 400 Note: The 8DPSK modulation is the worst case and recorded in the report. Report No.: AGC01082200401FE03 Page 52 of 65 TEST PLOT OF LOW CHANNEL Report No.: AGC01082200401FE03 Page 53 of 65…

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Test Setup Photos RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ