Pentair Kreepy Krauly Prowler 820

Prowler 820 cleaner is the computer-controlled, programmed cleaner that scrubs and vacuums pool's bottom, walls and steps and provides supplemental filtration of pool water.
Totally independent of pool circulation system, Prowler provides on-demand cleaning without running pumps. It requires no installation, no booster pump, no hoses. Just plug it in and place it in the pool... it's a totally self-contained cleaning and filtration system.

http://www.pentairpool.com/pdfs/prowler820DS.pdf