The iRobot Roomba Dual Mode Virtual Wall Barrier gives you greater control over where your robot cleans. Virtual Wall Mode keeps your robot in the rooms you want cleaned and out of the ones you don't. Halo Mode keeps your robot away from items you want to protect. Compatible with Roomba 900, 800, 700, and 600 Series. Virtual Wall Mode Use a Dual Mode Virtual Wall Barrier to manage where your robot cleans.