... home theater 2.RMS:30W+10W*2 3.Speaker unit:4"+3"*2 4.Electroplating Knob 5.Support usb ,sd card ,vfd display ... model by 2010-2011yearSpecification:2.1CH home theatre with remote controller 1,Output power:30W+10W*2(RMS)2,Speaker driver:woofer ... Quantity:1550sets/40HQ 2.1 Piano home theater system speaker ,With usb ,sd ,vfd display, fm , karaoke , mini remote function