iRobot double virtual walls, just limit the area to be cleaned. With iRobot's new dual virtual walls, you can easily limit the movements of your Roomba or Scooba so it can't access areas you don't need. Virtual Wall dual-function virtual barrier system gives you more control over where the robot cleansWith virtual wall mode, you can decide in which rooms the robot should and should not intervene, and halo mode creates a protected area around the objects you want to protectThese virtual walls are so small that they are almost imperceptible, and they work from two AA batteries per unit (battery not included in this product) There are two modes in which you can determine the position of the cleaning robot. An automatic virtual wall ensures that your robot only cleans in the rooms you want. And the Halo mode will not let your robot approach the object you want to protect. Virtual wall mode: greater range to block openings up to 3mThe configuration consists of projecting a beam of infrared light of 3 meters in a straight line. It is good for doors. Halo mode: forms a circular barrier with a diameter of 1.2m. The configuration produces a circular infrared beam of 1.2 meters around the device. Halo mode creates a circle around the cell that robots will not enter. This can be useful if you have pets. Compatible with Roomba robots of the 500, 600, 700, 800 and 900 series Roomba robots is compatible with ROOMBA 500, 600, 700 series robots, 800 and 900. You will receive a flawless new product in its original Mimiy packaging not supplied by the original supplier Contents of the box2 Virtual Wall