Polaris F945 4WD Robotic Cleaner, 50ft length cleaner features a rear water cleaning stream which blows debris off stairs and out of tight corners. Its over-sized suction intake allows it to ingest larger debris effortlessly. With durable Aqua-Trac tires and Vortex Vacuum Technology, the P945 tackles any pool terrain and climbs over obstacles without getting stuck. It cleans all pool surface types and scrubs the floor, steps, walls, and tile line with a pleated scrubbing brush in as little as 1.5 hours.