Pool vac classic - concretethe exclusive smartdrive programmed steering pattern ensures the entire pool is cleaned quickly and completely. A unique turbine/gearing system provides constant and balanced water flow assuring quiet operation and gentle movement across the pool bottom. A wider cleaning path handles pollen sand twigs leaves and pebbles with ease and longer-wearing components wings flaps and shoes give additional product longevity. Wide side wings increase the speed of pool coverage by 10 .