Hayward 900 Wanda the Whale Suction Above-Ground Pool Cleaner (Automatic Pool Vacuum) Unique turbine/gearing system provides constant balanced water flow assuring quiet operation and gentle movement across the pool bottom Advanced, contoured head design allows the steering pattern to be completed in minimal time Installs in less than 10 minutes, without tools Deluxe bumper ring minimizes friction for easy movement away from walls and resumption of the programmed steering pattern 1 year warranty