iRobot dual virtual walls, easily limits the area to be cleaned. With iRobot's new Dual Virtual Walls, you can easily limit your Roomba's or Scooba's movement so that it doesn't access areas you don't need. The barrier system virtual wall dual function Virtual Wall gives you more control over where the robot cleans. With virtual wall mode, you can decide which rooms the robot should and shouldn't enter, and halo mode creates a protected area around objects you want to protect. These virtual walls are so small that they are almost imperceptible, and they are powered by two AA batteries per unit (battery not included in this product). There are two modes where you can determine the cleaning robot's position. An automatic virtual wall ensures that your robot only cleans in the rooms you want. And Halo Mode does not let your robot get close to the object you want to protect. Virtual wall mode: Longer range to block openings up to 3 m. The installation consists of projecting a 3-meter long beam of infrared light in a straight line. It's good for doors. Halo mode: Forms a circular barrier with 1.2 m diameter. The installation produces a 1.2 m circular infrared beam around the unit. Halo mode creates a circle around the cell that robots will not enter. This can be useful if you have pets. Compatible with Roomba 500 series robots, 600, 700, 800 and 900. The virtual wall dual function virtual barrier is compatible with ROOMBA 500, 600, 700, 800 and 900 series robots. Package contents: 2 Virtual Wall Dual Function Virtual Barrier. When shopping, please pay attention to the product's size and dimensions to ensure that it meets your needs. In the title and we have provided detailed information about the product, including its features and specifications. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please do not hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you like it!