The Invacare Zoom 400 Highly Maneuverable Vehicle (HMV) is a revolutionary new concept that combines the power wheelchair technology of center-wheel drive with scooter aesthetics for indoor performance and outdoor maneuverability. Center-wheel drive technology enables effortless maneuverability and performance both indoors and outdoors. The Zoom 400 HMV is versatile and will effortlessly move between indoors and outdoors, over grass, gravel, carpet, or tile.