iRobot Roomba 4210 Discovery Vacuuming Robot, White | Your Best ...

The docking station appears to work just like a virtual wall, Roomba doesn't know that it is there unless it crosses its path, so you make sure that it is in a wide open room where Roomba is sure to cross its path in its waning minutes of power ... I bought mine at a local store in the mall and had to return my Pro Elite version 4 times before I finally got one that wasn't buggy. Then, under the warrantee, after my fourth one went on the fritz I was able to upgrade to the ...