Features: 

1. Fm transmitter

2. Led display window

3. Line audio input

4. Independent Bluetooth start /shutdown button

5. Support playing music by USB disk

6. Support mp3/wma music format

7. Answer /hang up/reject/redial via Bluetooth

8. Bluetooth stereo music play

9. Call echo cancellation and noise reduction(CVC)

10. Dual USB output voltage provides power to other devices up to 5v/2.5a

11. Automatic memory function of power failure frequency point

12. Display of on-board battery voltage