BR16 Car Bluetooth Dual-Microphone Receiver-Transmitter Long Lasting Audio Adapter 1. Type-C fast charging, when the device is powered off, the charging icon will be displayed and the charging icon will go out when fully charged 2. Bluetooth 5.3 chip, more stable multi-data transmission, clearer sound quality 3. Ultra-long distance transmission, without obstacles within a range of 10 meters, you can enjoy music at any position 4. Ultra-long battery life, with a built-in 240mAh lithium battery, you can listen to music while charging 5. Free switching between receiving and transmitting modes, receiving mode RX, with two Bluetooth indicators flashing, transmitting mode TX, the Bluetooth indicator is always on 6. Transform into car Bluetooth, insert into the car AUX port, making the car audio system transform into a Bluetooth connection with the Bluetooth-enabled mobile phone, and then you can play music 7. Transform into Bluetooth computer, connect to the computer AUX audio port, through Bluetooth, the sound is transmitted to the Bluetooth headphones, allowing you to play games and watch videos 8. Transform into Bluetooth speaker, after pairing with the phone Bluetooth, connect to the AUX audio port, without Bluetooth function, the speaker can also be transformed into a Bluetooth speaker 9. Compact and lightweight in size, convenient to carry and use Parameters 1. Bluetooth version: Version 5.3 2. Charging voltage: 5V 3. Charging current: 186mA 4. Operating current: 20mA 5. Power-off current: 42 microamps 6. Battery capacity: 240mAh 7. Charging time: about 2 hours 8. Operating time: RX: about 11 hours; TX: about 17 hours 9. Bluetooth transmission distance: straight line 10m 10. Effective distance of Bluetooth microphone: 0.5 - 2m