Model Number: JK6890BT Memory Size: USB/SD Screen: Yes Battery Life: > 20 hours Style: Card Function: Bluetooth, FM Radio, USB/SD-MP3/FM/Bluetooth Color: Blue / Green Place of Origin: Guangdong, China (Mainland) Application: Pro audio, Amplifier,Speaker,car audio... Product type: MP3 decoder board Format: MP3/WMA Memory: USB/SD Support: IR remote control Panel color: Black Panel size: 75*50mm Voltage: 12V 5v JK6890BT Support USB bluetooth mp3 board with controller 1, JK6890BT Support USB bluetooth mp3 board with controller Functions: USB/SD/MP3/WMA/Line in (AUX)/FM/Bluetooth MP3 decorder support 32â??320kbps FAT16 or FAT32 systems supported 6 Keys: PLAY/PAUSE,PREV/VOL-,NEXT/VOL+,REPEAT,EQ,INPUT With Remote control 2, Keys function: PLAY/PAUSE: Under MP3 mode, short press PLAY/PAUSE, long press STOP.. Under AUX mode, press PLAY/PAUSE. Under FM mode, short press to automatic selection. PRE/VOL-: Under MP3 mode, short press LAST, long press VOL-. Under AUX mode, press VOL- Under FM mode, short press to selection down, long press VOL-. NEXT/VOL+: Under MP3 mode, short press NEXT, long press VOL+. Under AUX mode, press VOL+. Under FM mode, short press to selection up, long press VOL+. REPEAT: single repeate, all repeate. INPUT: USB/SD/AUX/FM switch. 3, Power supply DC5V (Optional 12V) 4, Remote Control--- Keys function Power :ON/OFF (standby) Mode : Same function with Long press Play/Pause button on pannel for switch the working Mode PREV: For Previous song in USB/SD state NEXT: For Next song in USB/SD state VOL+ : Volume up VOL-: Volume down RPT: For switching one song repeat or all song repeat in USB/SD state, default is all song repeat . U/SD: Switch USB/SD /FM scan. MUTE: First press mute , press again will release from mute. EQ : NORMAL/JAZZ/ROCK/POP/CLASSIC/COUN PLAY/PAUSE : For play and pause in USB/SD state. Button 0-9 : Select song in USB/SD state, if the song number over 9 , just input the numbers in series . 5,Panel dimension :75*50mm