Experience the freedom, safety and productivity of going cordless. The BV 5/1 Bp backpack vacuum is 100% powered by its lithium-ion battery leaving the operator to move around uninhibited. Our superior technology produces a powerful, yet quiet vacuum that increases your productivity exponentially. It is the quietest backpack vacuum on the market, only emitting 55 dBA. Expect 100 percent of the performance that you get from a traditional backpack vacuum.