... card in 4.CE,FCC,ISO,ROHS 5.suitable for multimedia room 2.0 Professional Active Speaker with USB/ ... volume control and Audio input volume control ;5.USB/SD card reader function with PREV/PLAY or PAUSE/NEXT ... make metal mesh speaker grille if large quantity)7.These speaker has CE,FCC,RoHS,ISO9001,ISO14001,CCC ... :95db ·Power Output:2×40W·Dimension:70cm*15cm*7.5cm Speaker driver:4.5"x1+2"x1 ·Power Supply: ...