Hayward RC9990 TigerShark Quick Clean 110-Volt/24-VDC Robotic Pool Cleaner Advanced, easy-to-use, in-ground robotic pool cleaner Unique on-board computer calculates size of the pool and programs itself for efficiency, intended for vinyl, gunite/tile, and fiberglass On-board pump cleans up dirt and debris from floor, steps, and walls Features a reinforced cartridge filter element Perfect for pools up to 20-by-40 feet