iRobot Virtual Wall Lighthouse 2-pk for Roomba 500/600 Series
The Virtual Wall Lighthouse uses an invisible infrared signal to help Roomba 500 Series robots achieve the most efficient and thorough room-to-room cleaning possible. Contain Roomba in one room until the room is completely vacuumed before moving on to the next or block off-limit areas in your home. Compatible only with Roomba 53501,54001,55001, 56001, 57001,57101,78001 models that are equipped with Lighthouse Technology. Requires 2 C batteries (not included)