iirc, it was the built-in type that pop-up from the floor.
In-floor pool cleaning systems are made up of pop-up cleaners that literally pop up out from the floor of the pool, clean the water, and retreat to the floor when they are done. They are added to the pool during its construction.
In the end we said screw it, we were looking at 120K and we're walking distance from a beautiful neighborhood pool.
I've watched my neighbor constantly blowing off her deck and cleaning her pool and I think they've used it maybe 4 times during the year+ they've owned it.