Feature:MP3 player for bt multifunctional vehicle1. built-in bt + microphone2. support hands-free calls.3. Support advanced audio transmission mode.4. support the clock indicating while the power is off.5. high quality digital stereo fm radio6. Support FM1-FM2-FM3 of three band radio store and can preset 18 radio stations. (Radio frequency: 87.5-108mhz)7. support usb/tf card reader8. Support audio: mp3/wma/wav formats and so on.9. Media folder playback function10. remote control support.11. Rotary electronic volume control mp3 play 12. Supports pause/preview/repeat/random playback and 10 tracks up/down selections.14.Electronic type low/treble/left and right balance/front and rear balance volume control15.Aux audio input front hole and rca audio output hole of rear l/r terminal.16.4 band high power output (4 high power speakers)17. Working voltage: dc12v