This Bluetooth 5.0 adapter is more convenient and safer for answering calls and listening to music Bluetooth 5.0 chip, fast transmission speed, more stable connection One-key operation, more convenient, turn on/off, answer/reject call Traditional speaker is connected through AUX audio port or RCA audio port, speaker without Bluetooth function can also be transmitted wirelessly When driving, the mobile phone is connected to the B12S via Bluetooth and the 3.5mm audio cable is plugged into the car, and then you can enjoy music with the car stereo No driver is needed, just plug and play Specifications: Bluetooth: 5.0 Working Distance: 10m(Barrier Free) Sensibility: -42db  Charging Time: 1 Hour Play Time: 5 Hours Bluetooth Protocol: A2DP/AVVRCP Input/Output Interface: 3.5mm Battery Capacity: 220mAh Charging Port: Micro USB Size: 78x23x16mm