• DUAL-MODE VIRTUAL WALL: Upgrade virtual wall is compatible with Irobot robot, beam mode and halo mode help you control the robot's working range and protect your objects on the ground
• BEAM MODE: The beam mode of the virtual wall can produce virtual lines for up to 3M / 10FT to help you intercept the robot to avoid the robot into the unpopular room
• HALO MODE: Virtual wall can generate a virtual aura barrier having a diameter of 1.2M / 4FT to keeps your robot away from items you want to protect, like your pet's food and water bowls
• VIRTUAL WALL BARRIER: Virtual wall uses 2 * aa battery(Not included ) with low battery indicator light, Effectively help you control the work scope of robots
• Compatible with iRobot Roomba 675 694 etc. 600 series, but 600 series produced before 2015 may not be used. Package may vary