Hayward RC9950 TigerShark 110-Volt/24-VDC Robotic Pool Cleaner The only Robotic with 2 fine porosity reinforced filtering cartridges versus our competitor's debris bag. Calculates the size of your pool and programs itself into the most time and energy efficient pattern for a spotless pool Its 24 volt motors are safe, use less energy and provide the most efficient vacuum strength when compared to other cleaners. Clean up is easy. No messy bags to deal with Perfect for pools up to 20 ft x 40 ft