1. Start the car, the screen will display the car battery voltage for 3 seconds.
2. CVC technology to control noise and storm then to create full-duplex sound quality.
3. When the device is switched on, the phone can automatically connect to Bluetooth in your second time use.
Specifications:
-Bluetooth Version: 5.0
-Frequency Range: 87.5-108.0MHZ
-USB (max capacity): 64GB
-Transmission distance: 3M
-Low power alert: flashing under 12V
