... speaker system support usb,sd function play with remote control,and digit tube play showing on subwoofers panel 2.1CH audio speaker system, ... black colorWith multi function play, can be very convenience play for music,filmes,games and with remote ... .Specification:1,output power:30W+10W*2(RMS)2,Speaker driver:woofer5.25inch,satellite3inch*23,Frequancy response:40HZ-20KHZ4 ...