Edifier USA e1100 Predator 2.1 Multimedia Speaker System Downward firing 5 inch subwoofer and 2 inch front firing full-range driver in each satellite 2 inch passive radiator in each satellite for enhanced audio output Angled satellites for enhanced sound projection Auxiliary input port for versatile connectivity to external devices Master volume and on/off dial located on the top of the subwoofer with blue halo indicator light