The Dolphin Nautilus scrubs and vacuums all pool surfaces while filtering the water in just 3 hours. Innovative scanning technology ensures complete pool coverage. All-surface climbing brush cleans right up to the waterline. Includes an easy-to-clean cartridge system with spring clean-up filter for convenience. Patented swivel cable helps prevent tangling. For all pools types up to 50 in length. 1 year warranty.