iRobot Roomba 650 Automatic Robotic Vacuum (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day iRobot warranty Ships in the retail box pictured. Roomba 650 picks up an amazing amount of dirt, pet hair and other debris with its patented 3 stage cleaning system Conveniently schedule up to 7x per week. 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 The included Virtual Wall keeps Roomba cleaning where you need it and blocks off-limit areas