See detail @ http://www.amazon.com/gp/product/B000LXTKMK?&tag=cybermday-20 The Chauvet B-250 is Chauvet's mid-level bubble machine, designed for larger areas, where portability remains a top need. It features an all plastic construction to prevent rust and lower weight, with an easily removable fluid tank. This unit is a mobile DJ's workhorse.