Digital control system for accurate, stable water temperature that helps to keep your reservoir cool. This product is environmentally safe. Features freon-free R134a refrigeration system. Will chill the water from 37-90 degrees. Anti-corrosive, pure titanium evaporator. Includes over current protection system and memory protection. Max water volume of 132 gallons. Recommended pump size 317 to 793 GPH. Includes plumbing connections of 3/4 inch male NPT with hose fittings. 120 volt at 4.4 amps. Dimensions are 21 in W x 15.5 in D x 22 in H and weighs 52 lb.