... 1, RMS:30W+10W*2 2, Driver unit:5.25"+3"*2 3, With USB/SD,FM,Karaoke 4, Knob control ... volume 2.1 Tower speaker system with VFD displayFeatures:1, Used for DVD/CD/TV/PC ... FM radio looks much top grade.4, With knob control make volume more suit well.5, Can add karaoke ... function Specification:1,Output power:30W+10W*2(RMS)2,Speaker driver: ...