Soniclean Soft Carpet Vacuum Cleaner/Handheld Combo Adjustable vent system for easy maneuverability on soft style carpeting Special soft nylon brush roll bristles  effective, yet gentle on soft style carpeting Large front wheels  allows the vacuum to float on soft style carpeting making it easy to push and pull 200 sonic vibrations per second loosen deep, ground-in dirt and dust Sophisticated jam sensor technology automatically shuts off the vacuum if it senses a jam