... :30W+10W*2 3.Speaker unit:4"+3"*2 4.Electroplating Knob 5.Support usb ,sd card ,vfd ... bass, treble, echo, mic-volume separately control4. Compatible with PC/VCD/DVD/CD/TUNER/TAPE/TV and other audio ... 2.1CH home theatre with remote controller 1,Output power:30W+10W*2(RMS)2,Speaker driver:woofer 4 ... /40HQ 2.1 Piano home theater system speaker ,With usb ,sd ,vfd display, fm , karaoke , mini remote function