... 50W 2.designed for white board 3.MP3,CD,PC,SD card in 4.CE,FCC,ISO,ROHS 5.suitable for ... multimedia room 2.0 Professional Active Speaker with USB/SD/Remote ,column speaker strong point:This active speaker system is ... MIC volume control and Audio input volume control ;5.USB/SD card reader function with PREV/PLAY or PAUSE/NEXT control ... place order ! 2.0 Professional Active Speaker with USB/SD/Remote