It's automatic. MEGA automatic pool cleaner works when your pool pump works, using your pool's existing filtration system. Quiet and attractive, the MEGA cleaner is the intelligent choice in automatic cleaners for smart pool professionals everywhere. The MEGA cleaner offers the latest in automatic pool cleaning technology. What's the secret to the MEGA's superior pool cleaning performance? The answer lies in its unmatched advanced technological features, the extended life flapper and superb underwater steering capabilities. The MEGA cleaner uses similar principles of buoyancy, propulsion, and water flow as other aquatic suction pool cleaners. The MEGA pool cleaner will automatically remove dirt, debris, bugs, twigs, leaves, sand, and even small pebbles. It installs in minutes, and comes pre-assembled in the box. Just attach the Disc and Extended-Life Hoses. No tools are required. We even include an easy-to-follow installation guide. The MEGA pool cleaner has only one operational moving part- the Extended-Life Flapper. No gears, wheels or weak diaphrams mean simple operation which ensures maximum performance, maximum power and low-cost maintenance.