Roomba 630 picks up an amazing amount of dirt, pet hair and other debris with its patented 3 stage cleaning system Dirt Detect technology employs an acoustic sensor to identify dirtier areas and spends more time cleaning them iAdapt is an advanced system of software and sensors that ensures Roomba vacuums every section of your room and cleaning areas you cannot easily reach The included Virtual Wall keeps Roomba cleaning where you need it and blocks off-limit areas