Radial Root Cyclone Technology Captures more microscopic dust than any other's cyclone Self-Adjusting Cleaner Head Seals in suction across carpets and hard floors. The motorized brush bar with stiff nylon bristles drives deep into carpet to remove ground-in dirt Ball Technology Steers easily into difficult places with a simple turn of the wrist Designed for Homes with Pets Tangle-free Turbine tool removes hair from carpets and upholstery