... 1.2.1 ch home theater 2.RMS:30W+10W*2 3.Speaker unit:4"+3"*2 4.Electroplating Knob ... function, Support MP3 music format2. Nice VFD display 3. Volume, bass, treble, echo, mic-volume separately ... selling model by 2010-2011yearSpecification:2.1CH home theatre with remote controller 1,Output power: ... *370*675mm/4sets Quantity:1550sets/40HQ 2.1 Piano home theater system speaker ,With usb ,sd ,vfd display, fm ...