... 3. Volume, bass, treble, echo, mic-volume separately control4. Compatible with PC/VCD/DVD/CD/TUNER/TAPE/TV and other audio ... selling model by 2010-2011yearSpecification:2.1CH home theatre with remote controller 1,Output power:30W+10W*2(RMS)2,Speaker driver:woofer 4 ... : 692*370*675mm/4sets Quantity:1550sets/40HQ 2.1 Piano home theater system speaker ,With usb ,sd ,vfd display, fm , karaoke , mini ...