SmartPool NC72S Wall Climber Scrubber Robotic Pool Cleaner, Blue Swimming pool cleaner has an intelligent navigation that does not require walls to change direction Runs on safe 12 volts, ETL, CSA and CE approved, easily serviced by the user 10 pounds, making it easier to remove from your pool, gel-Pro brushes will quickly clean vinyl, fiberglass and concrete pools Uses very little power, costs just pennies to operate, and increases water conservation by reducing the need to backwash your pool Quick drain system lets water drain out of unit quickly upon removal from pool