uses infrared beam to block Roomba from doorways and other off-limit areas Requires 2 AAA Batteries(not include) Size: 4.3 x 4.3 x 10.5cm Material: ABS colour: black Package Contents: 1 x virtual navigation wall barrier Only the above package content, other products are not included. Note: Light reflection 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.
Fruugo United Kingdom