Model Number: JK6836 Memory Size: USB/TF Screen: No Battery Life: > 20 hours Style: Card Function: FM Radio, USB/TF-MP3/FM/AUX Color: Blue / Green Place of Origin: Guangdong, China (Mainland) Product type: MP3 decoder board Application: Pro audio, Amplifier,Speaker,car audio... Format: MP3/WMA Memory: USB/SD Support: IR remote control Panel color: Black Panel size: 105*25.5mm Voltage: 12V or 5V 1, JK6836 high quality sd fm usb audio reciever circuit board speaker pcb board function USB/TF/Line in (AUX)/FM Format:MP3/WMA MP3 decorder support 32â??320kbps FAT16 or FAT32 systems supported 4 Keys: MODE, NEXT/V+, PLAY/PAUSE/SCAN, PRE/V- With Remote control 2, Keys function: MODE: USB/TF/AUX/FM switch. Long press 3 seconds for power ON/OFF NEXT/V+: 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+. 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/V-: 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-. 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/TF 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/TF /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/TF state, if the song number over 9 , just input the numbers in series . 5, Panel dimension :105*25.5mm