The RS 05 makes cleaning very easy, even in areas with limited space and hard to reach areas, like offices, trains, buses, stairs, in fact anywhere. Its ergonomic design, adjustable harness and light weight gives unique user comfort. With its three-stage filtration and extremely low noise level the RS 05 is suitable for even most noise-sensitive areas. The hot-air exhaust is placed in the back for cooler operation. And so the backpack can also be placed on the floor while in operation. Simply clean with quality.