Compatible with various digital devices, and efficiently compatible with various mobile phones, tablets, earphones, MP3, GPS navigation terminals. Dual USB smart fast charging, can charge two different devices at the same time.Built-in intelligent identification chip, intelligently match the current required by the device, and charge safely and quickly. It has short-circuit, over-voltage, over-current, over-temperature, and anti-interference protection chips.Soft LED light, not dazzling, easy to find the USB charging port at night.Bluetooth plays mobile phone music, Bluetooth 5.0 high-speed connection, transmits audio and high-quality music in the mobile phone, and transmits them to the car stereo through FM.Simple operation, one key to answer and hang up the phone, turn the button to adjust the volume and frequency.