iRobot roomba lighthouse virtual walls! Compatible with certain roombas! 2 pack!

These prevent the roomba from entering in a certain area that you don’t want the roomba to go. Compatible with roomba 540 550 560 564 571 580 581 780 782 785 786 790 880 885 886 This can be either be used as a virtual wall (makes an invisible line to prevent roomba from entering a room) or it can be set as a lighthouse where it prevents the roomba from entering a circular area! Requires 2 C batteries that will last 10-12 months