When its battery is low, the roomba i7 robot vacuum will charge itself and pick up where it left off to quickly complete the cleaning. Ideal for pet hair. The 2 exclusive multi-surface rubber brushes thoroughly clean floors. The first dislodges dirt and the 2nd turns in the opposite direction to lift and pick it up. Dirt Detect technology allows the roomba robot vacuum to detect particularly dirty areas of your home for deeper cleaning. The roomba i7 vacuum cleaner remembers your home layout and makes smart maps. Thanks to mapping, it cleans your floors thoroughly, targeted in parallel straight lines.