I can't remember what mine is. I think its an 11c. It has a random pattern that will clean the same area of the room for 5 minutes and ignore other spots during its cycle. I generally run mine through 2 cycles in each room.
I use my old Kirby Vacuum twice a week and my robovac on the days I don't vacuum. We are on this schedule because of two dogs that shed faster than we can keep the floors clean. If it weren't for our robovac we vacuum every day.