Product parameters: 1.1 Bluetooth chip Jerry 6904F V4.2 version 1.2 Support A2DP decoding 1.3 Receiving distance within 10 meters 1.4 Working frequency 2.402GHz~2.480GHz 1.5 Transmit power CLASS2, MAX4dbm 1.6 Audio decoding method SBC 1.7 Adjustment method GFSK, TT/4 DQPSK, 8DPSK 1.8 Signal to noise ratio >75dB 1.9 distortion <1% 2.0 charging input voltage DC5±0.25V 2.1 Battery Specifications 3.7V/35mAh 2.2 Working voltage 3.7V (3.3-4.2V) 2.3 Charging time ≤ 1H 2.4 microphone sensitivity -42 ± 3DB 2.5 Low Voltage Tip 3.3V 2.6 Continuous playback of music time ≥ 2H 2.8 Standby connection time ≥24H 2.9 Operating current ≦25mA 3.0 quiescent current ≦5uA 3.1 Pairing name tws-i7 3.2 Pairing code 0000 (lower than V2.1 version of the phone) 3.3. Product size: diameter 25mm. 15mm wide. 35mm high 3.4. The net weight of the product is about 8g 3.5. Battery capacity 45MAH (charging bin 450MAH) 3.6. Charging power supply: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger) 2. Charging bin 4.1 Input voltage 4.5V-5.5V/1.5A (Typical value: DC5V 1A) 4.2 Charging mode linear, three modes: trickle charge / constant current / constant voltage 4.3 Charging constant current 950mA ± 100mA (set according to customer battery capacity) 4.4 Charging Constant voltage 4.35V ± 1% 4.5 Charge cut-off current ≤100mA (typical 50mA) 4.6 Power indicator The blue light is on and the power is on. The blue light is on, indicating that the battery is low and needs to be charged. 4.7 Charging display Connect the charger to charge, the red light flashes, and the red light is on. 4.8 Low battery warning The battery voltage is lower than 3.0V, and the main body automatically shuts down. 4.9 Headset Charging Short press the button to turn on the charging compartment to light blue light, no plug-in charging, automatically turn off after 15 seconds; insert the headset charging headset to light red, the headset is fully charged blue light, the headset blue light is on to ensure that the headset is 100% fully charged Press the button to shut down.