Bluetooth Audio Module MP3 WMA Player MP3 decoder with Board Module w/SD Card Slot/USB 2.0 Port/FM/remote display (7-12V) Support outside signal switch directly. Support USB, SD The input voltage: 7-12 v Support bluetooth (Bluetooth3.0EDR) (paired with the phone can be achieved after a good music radio) panel + remote control decoder board Remote control without the battery Support power-off memory function: memory before power play songs and volume. Support FAT16, FAT32 file system. Support MP1 Layer3, MP2 Layer3, MP3 Layer3 version of the song. Supports 32-320kbps MP3 songs.