iRobot Roomba Lighthouse Virtual Wall Model #81002. Excellent gently used condition. Both show normal wear for daily use items. Photos #7 (one on the left) and #8 show that a battery had corroded at some point in one Lighthouse/Virtual Wall. Has been cleaned and neutralized with baking soda as best as possible. Both have been tested and work as they should. Each one uses two "C" size batteries which ARE NOT included. From a pet friendly and smoke free home.