... , RMS:30W+10W*2 2, Driver unit:5.25"+3"*2 3, With USB/SD,FM,Karaoke 4, Knob control volume 2.1 ... /MP4 and all audio device.2, With dance VFD display screen make apperence very nice and elegant.3, Telescopic antenna digital FM radio ... looks much top grade.4, With knob control ...