With its enhanced design, including improved navigation, coverage, pickup, and filtration, this vacuum-cleaning robot makes it easier then ever to clean floors throughout the house–hands free. Simply press the "clean" button and the unit will vacuum the whole floor on its own, adjusting automatically to any floor surface including wood, tile, linoleum, rugs, and carpet. The vacuum's dual, high-speed, counter-rotating brushes pick up everything from tracked-in dirt by the front door to food crumbs on the kitchen floor to pet hair throughout the house. It also provides anti-tangle technology with auto reverse, innovative spinning side brushes to ensure thorough cleaning in corners and along baseboards, and a gentle-touch bumper that senses obstacles so that it can slow down and carefully clean around them. The unit's dirt sensor will direct the cleaning time and focus where it's needed most, and its low-profile design means easy cleaning under beds, couches, and other hard-to-reach areas. Another thoughtful detail includes its ability to schedule preset cleaning times–great for coming home to a clean house after a long day at the office. Even more, the cleaner comes with built-in cliff sensors that prevent it from falling down stairs and a Virtual Wall system, which allows for setting up invisible barriers that confine the unit to a designated area. The vacuum's large dustbin empties easily, and its improved filtration system traps dust, pollen, and other allergens, helping to ensure only clean air gets released back into the room. For added convenience, the vacuuming robot automatically returns to its self-charging Home Base to dock and recharge between cleaning cycles or when the battery starts to run low. Accessories include a bumper extension, a brush cleaning tool, a power adapter, a rechargeable battery, one extra filter, one Virtual Wall Lighthouse, and four "C" batteries for the Virtual Walls.