Similar to the Roomba(TM) and also from IRobot(R) Corporation, Dirtdog(TM) shares a similar design, a common "Clean" button, and it can be used with the homebase. Unlike Roomba, Dirtdog can pick up much larger debris such as: Sawdust, Nails, Nuts, and many other things found around your garage or workshop. It is based on a Roomba 41xx series design.
Dirtdog also does not have a vacuum motor in the bin like Roomba. Instead it has dual fast spinning brushes that allow it to sweep at super speeds picking up much more than an ordinary broom. Since Dirtdog does not have a vacuum motor, it has a larger dirt bin to hold all that extra sawdust its going to be picking up. Dirtdog would be a perfect gift for someone who doesn't have time to sweep their garage, basement, patios, and decks.
Also like Roomba, Dirtdog will not fall off ledges and cliffs and works with Virtual Walls(TM).
So, use Dirtdogs for your Dirty work. Dirt Dog retails for around $120.