mp3 decoder module cards with USB and SD card slot 800 pcs per day to output MOQ ... , next, pause, volume regulatingWith wireless remote controlApply to mini reader, mini amplifier, inserted card mp3 player, mp3 audio, car audio ... PREV/ VOL- button to select LAST TRACK songOperation in Remote control: 1, PLAY/PAUSE : Press PLAY/PAUSE button ... - for 1 second to select Volume- . mp3 decoder module cards