Nitro Wall Climber NC51 Robotic cleaner for inground pools Cleans and brushes floors and walls up to the waterline Intelligent navigation - cleans where the dirt is (75% floor/25% walls) Revolutionary robotic design enabling a wider cleaning swath for 50% faster cleaning coverage Quad-port brush-to-port suction for thorough vacuuming of acorns, leaves and fine debris Obstacle-avoidance technology - will not get stuck Toggle switch for 1-hour rapid clean or 3-hour systematic cleaning All-surface cleaning for vinyl liner, fiberglass, tile and concrete pools Quick-drain system for Easy-lift removal from pool; weighs only 8.5 lbs. 60' super-cord with kink-resistant technology Super capacity filter bag - Biggest in industry Eco-friendly; uses 70% less energy than other cleaners Consumer or dealer DIY serviceability ETL, CSA and CE approved; manufactured in an ISO 9000 facility 2-yr limited warranty ECO-FRIENDLY The Nitro Climber, with its high performance/low energy engineering, uses very little power and costs just pennies to operate! It helps the environment even more by reducing pool chemical consumption and increases water conservation by reducing the need to backwash your pool filter.