... ,ISO,ROHS 5.suitable for multimedia room wooden plate slim whiteboard speakers,column speaker strong point:This active speaker system is ... ,and it is simple installation. You just hang it on whiteboard side,ok ,finish. Amplifier speaker/active speaker: it has inbuilt ... cover net (we can make metal mesh speaker grille if large quantity)7.These speaker has CE,FCC,RoHS,ISO9001,ISO14001 ...