Perfect for residential pools up to 20 by 40-feet, Cord Length 55-feet * Powerful on-board pump sucks up dirt and debris while roving the bottom, walls, inclines and steps * Cleanup is easy with the patented filter cartridge system ? just remove and rinse with a garden hose * Calculates the size of the pool and programs itself into the most time and energy-efficient cleaning pattern for a spotless pool * Patented Quick Clean technology cleans any shape, size or type of pool in 60 mins