With Roomba, you can clean up even when you aren't home. This vacuuming robot efficiently picks up dirt, debris, pet hair, dust, allergens and more from carpets and hard floors. It does the vacuuming for you. Roomba removes dirt, dust, and much more while automatically adjusting to clean carpets, hardwood, tile, and linoleum floors as it moves through your home. Roomba 620 has superior hair handling ability; the robot's AeroVac Technology maximizes air flow, pulling debris off the brushes and into the back of the bin. The innovative composition of the robot's longer-lasting brushes allows it to handle fibers such as hair more effectively, making maintnence quicker and easier than ever. Using iAdapt Responsive Cleaning Technology, the robot thoroughly vacuums the entire floor, including hard-to-reach spots under furniture. ?AeroVac three-stage system ensures clean floors from wall edge to wall edge. ?Dirt Detect technology uses an acoustic sensor to identify dirtier areas, so the Roomba spends more time cleaning them. ?iAdapt software and sensors allow Roomba to clean under furniture, around everyday obstacles and along walls, while avoiding stairs and drop-offs. ?Self-adjusting system equally cleans hardwood floors, carpets and linoleum. ?Details: ?Includes: self-charging Home Base, battery, filter, side brush, bristle brush, beater brush The Roomba 600 series, which includes model 620 offers a number of improvements over the 500 series. On the hardware front the 600 models has "AeroVac Technology" for an improved vacuuming system, an improved cleaning head module with better brush design and airflow, and a pop of color on the top. The 600 series looks a bit nicer than the 500s, is a slightly more efficient cleaner, and its bin has to be emptied less often, but most of the key features are unchanged. The 600 series is still designed for up to 1200 square feet, works with the optional virtual walls.