The Billy Goat QV550HSP QuietVac is a self-propelled outdoor vacuum with hydro drive shift-on-the-fly transmission powered by a high performance 160cc Honda engine.  Equipped with a composite intake nozzle and cyclonic hood, it features an 84cm (33") working width. The volute housing and fan system provide the best suction power of any litter vacuum on the market today. The six-bladed armour plate steel fan reduces debris by a ratio of 12 to 1. The state-of-the-art cyclonic filtration system, when combined with exclusive Dust Sock™ technology, dramatically reduces dust in dry conditions, providing the ultimate in operator comfort.