1.Wirelessly transmit phone call from bluetooth mobile phone to the car fm stereo system
2. One button to enjoy the bass booster
3. Switch to hands free mode automatically from music playing status when receiving calls
4. With voice prompts over current protection, short circuit production and over temperature protection
5. Built in microphone
6. Dual usb outputs 5v/3.4A charges ipod, iphone, ipad and other devices
7. Support usb disk/micro sd card
8. Elegant led display numbers