The SmartVac 464 walk behind sweeper can vacuum and sweep floors 10x faster than an upright vacuum. Its brush is self-leveling and can clean its own filter.   Key Features of the SmartVac 464 include: Brush that will automatically adjust to any type of surface while cleaning Self-cleaning filter Battery operation of up to 2.5 hours Only 55 dBa, so will not disrupt others while cleaning Features a digital hour meter to measure productivity Adjustable handle for easy transport and storage