Purchase 5 of these and get a P.O.P. Display Kit, in.clear (42-337-1004) from Gecko for free. Features: One of the most efficient water sanitation systems in the industry Programmable Low Level settings 2 Operating modes Low maintenance! Easy to handle Eliminates the need to add extra chemicals to destroy pollutants Does not produce any offensive odors & reduces eye irritation K.200 Keypad included 3 to 40 g.p.m. flow ratein.clear is an environmentally friendly system that generates and releases bromine into the spa water with the primary purpose of controlling and rapidly destroying any microbiological contaminants such as waterborne bacteria, algaes, body chemicals, organic matter given off by spa bathers and other organisms known to be linked to recreational water illnesses. With its waterproof enclosure, its sturdy design, the new in.clear is one of the most efficient water sanitation systems offered to the spa and hot tub industry today. The new in.clear system needs very little maintenance and it can be easily installed on new or existing spas. In.clear can be installed horizontally or vertically.