Pentair LX5000G Kreepy Krauly Legend II Pressure Pool Cleaner, Grey/White Front-wheel drive design assures maximum traction for maximum traction on inclined surfaces for total pool coverage Four wheel design prevents tipping (common with 3 wheel cleaners) for uninterrupted and unattended performance Dual thrust jets for maximum power, speed and performance Automatic back-up feature prevents hang-ups by steps and in corners to assure uninterrupted and unattended performance