Specifications: 1,Double decoding,support MP3 or WMA or WAV or APE or FLAC format music 2,Bluetooth music and Wireless Bluetooth call function 3,Display with digital tube 4,Support USB or TF card Label: Yes 5,Power off memory function 6,Support 5-10 meters distance infrared remote control operation 7,Support LINE-IN(AUX) or LINE-OUT 8,Support FM(87.5MHZ-108.0MHZ) 9,Buttons:VOL- or AUTO or VOLand or MODE 10,Support power automatic protection system(the PCBA will not burn out if the positive and negative power is reverse,it only not working) 11,The highest volume level is 30 12,Power supply: DC5V or 12V. It can work on 5V and 12V. Button Operation Instructions: 1,Vol- button (last song or volume reduction): in MP3 state, vol- is short pressed for the last one, long press for vol- in FM state, short press is to increase one stage number 2,Auto button (play or pause): in MP3 state, auto is short to play or pause in FM state, short press is playing or pause, long press is automatic receiving station 3,Voland button (next song or volume increase): in MP3 state, Vol is short pressed for next song, long press for voland in FM state, short press is to lower a stage number 4,MODE button: switch between USB or TF or FM or AUX or BT functions in turn. Package Included: 1xMp3 Player Decoder 1xRemote Control (Without the Battery) 1xCables Note: This product does not have a power amplifier. When connecting, you must first connect the power amplifier, and then connect the speaker Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.