The Manual Virtual Wall shown here is a smaller, more streamlined virtual wall for use with your iRobot Roomba. The virtual wall keeps the Roomba from entering off-limit areas while taking up less space in the home than the original virtual wall. This Manual Virtual Wall by iRobot is compatible with the Roomba 500, 600, and 700 series robots only. The virtual wall also requires 2 C batteries which are not included.