How do Virtual Walls and Virtual Wall Lighthouses work?
A Virtual Wall® creates an adjustable, invisible, infrared beam that Roomba will not cross. Virtual Walls are used to block off-limit areas in your home. A Virtual Wall Lighthouse can be set to Virtual Wall mode or Lighthouse mode. Lighthouse mode ensures the most efficient room-to-room cleaning: it confines Roomba to one room until that room is thoroughly vacuumed then directs Roomba to the next room. It can also be set to Virtual Wall mode to block off-limit areas. Virtual Wall Lighthouses are compatible with Roomba 500 Series robots (models 535 and up).