Hayward Aqua Rite Salt Chlorine Control Panel. Aqua Rite uses advanced electrolytic technology to convert a small amount of ordinary salt - one teaspoon per gallon of pool water - into a virtually endless supply of fresh, pure chlorine. The process can produce up to 1.45 pounds of chlorine a day - enough to satisfy the sanitization requirements of pools up to 40,000 gallons. With salt chlorination, you don’t have to mix, measure or mess around with liquid or tablet chlorine. Heavy chemical odors, itchy skin, red eyes and bleached clothes are a thing of the past.
See link to owner's manual below for more details and installation instructions.