[Upgrade] Dual Model Barrier gives you better management of where your robot cleans.Compatible with All for iRobot Roomba i, e, s, 900, 800, 700, 600 and 500 Series Robots and Scooba 400 Series Robots, Replace Part Number 4636429.[Halo Mode] creates a protective circle of protect your pet's food bowl, water bowl, etc. No need to worry about your robot getting stuck under furniture with its help.[Beam Mode] creates an invisible, cone-shaped "barriers"(up to 10ft/3m) that only the for Roomba can see, preventing your robot from crossing openings. (stairways or doorways, etc.)[Easy to use] Place the where you like and select the desired mode.size 11.6x4.4cmMaterial plasticcolour blackPackage Contents 2 * Virtual Navigation Wall BarrierOnly the above package content, other products are not included.Note Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.