Hayward PL-PLUS-20G 20K-Gallon AquaPlus Salt Chlorinator and Chemical Automation Pool and Spa Control System Salt chlorinator and chemical automation pool and spa control system is convenient one box solution for new and retrofit pools It comes equipped with 4 relays and 3 valve outputs, manages 1 traditional heater and 1 solar heater Also equipped with a salt chlorination cell for pools up to 20,000 gallons Features variable speed pump control, super chlorinate function displays time, day, pool and spa temperature and ambient air Also controls on-off-timed of pool lights, light shows with Color Logic, Spa jets, backyard lighting, Water features, misters, fire pits and more