The Dolphin M400 brushes, scrubs, vacuums, and filters the entire pool including the floor, walls, and waterline. The new, advanced technology enables optimal scanning and pool coverage in a shorter cycle time. Add-on extra brushing system is twice as efficient. The rigorous brushing and scrubbing action reinforces the elimination of algae and bacteria. Top-opening filtration compartments enabling easy and convenient maintenance of the filtration system. There are three types of filtration options (ultrafine, disposable ultrafine, and coarse filter bags) on the Dolphin Supreme pool cleaner, covering all cleaning demands and requirements from spring cleaning to ongoing pool maintenance. One-way water valves prevent the escape of debris and ensure rapid water drainage Adjustable floats allow efficient scanning in different pool sizes Low voltage motor provides minimal energy consumption DIY – easy maintenance, at user and local dealer level