IROBOT Roomba 81002 Lighthouse Virtual Wall For 500 790 780 877 880 Black | eBay
Lot of 2 iRobot Roomba # 81002 Lighthouse Virtual Wall For 500 790 780 877 880 | eBay
Got this roomba as a gift. Also received these lighthouses from another friend… are they compatible??? How do I get them to work? When I put batteries in lighthouse the led flashes