1.speaker power:2*50W 2.designed for white board 3.MP3,CD,PC,SD card in 4.CE,FCC,ISO,ROHS 5.suitable for multimedia room wooden plate slim whiteboard speakers,column speaker strong point:This active speaker system is special designed for White Board. The speaker has inbuilt amplifier, you do not need another amplifier,and it is simple installation. You just hang it on whiteboard side,ok ,finish. ...