The name speaks for itself! If you have a Roomba, this is what you need. Without it, your Rumba is a useless cylindrical heap of garbage. He gets stuck under chairs, thinks the edge of your rug is a ledge, and there are gaps he can get in but never get out. Now if they just sell you another overpriced box, the Roomba isn't going to do a B-line for your toes every time it turns on. If you're a DIY enthusiast or have a 3D printer, skip this product and just make your own! All you need is an IR LED, a switch, some resistors and some batteries.