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 2.4g wireless classroom whiteboard speakers 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. Amplifier ...