Main function: 1. Double decoding supports music in MP3/WMA/WAV format; 2. Support Bluetooth function; 3, with digital tube display; 4, support MMC / SD / MMA and other cards, support USB interface (U disk); 5, power failure memory function 24C02; 6, support 5-10 meters distance infrared remote control operation; 7, support for external audio input LINE IN (AUX); 8, support radio FM, receiving frequency band (87.5MHZ-108.0MHZ); 9, button: four buttons multi-directional control, MODE / previous song / play / pause / next song; The button operation details: 1. Previous button (volume down): Short press in the MP3 state for the previous song, long press for the volume to decrease; short press in the FM state to adjust one station number; short press under the Bluetooth function Bluetooth is a song, long press to reduce the volume. 2. Play/Pause: Short press in MP3 state for play/pause; short press in FM state for play/pause, long press to automatically receive and save the station; short press for play/pause under Bluetooth function. 3, the next song button (volume increase): in the MP3 state, short press for the next song, long press for the volume to increase; short press in the FM state to adjust a station number; short press under the Bluetooth function Bluetooth next song, long press for the volume to decrease. 4. MODE button: Switch between USB/SD/FM/AUX/Bluetooth function. Package Content: 1 x Decoder 1x remote controller(without battery) 1 x Surface Shell (the product comes without retail packing,but don't worry,we will pack it well before sending) Bluetooth handsfree (support handsfree calling,bluetooth/TF card/USB Aux/3.5mm AUX playing) Blutooth A (support Bluetooth,FM,TF card,USB aux,3.5mm AUX),Colorful Bluetooth B(support Bluetooth,FM,TF card,USB aux,3.5mm AUX) Bluetooth C(support Bluetooth,FM,TF card,USB aux,3.5mm AUX) Mp3 decorder board without Bluetooth (support FM receiver /TF/USB aux/3.5 aux music playing)