iRobot Roomba model 400 Series Virtual Wall description
A Virtual Wall prevents your home robot from entering off-limit areas. Each emits an adjustable infrared beam (up to 13 feet) that the robot will not cross. Each Virtual Wall requires 2 D batteries (not included). Compatible with iRobot Dirt Dog, Roomba 400 Series, Discovery Series and Original Series.
User reviews for iRobot Roomba model 400 Series Virtual Wall - 
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