Automatic Pool Controls are used to control multiple functions of your swimming pool from the comforts of your home. They allow you to do such things as turning on and off of the pool pump and pool lights, controlling the temperature of your pool heater, or turning on and off your pool lights. The Jandy Aqualink systems are the leaders in Automatic Pool Controls. Jandy created one of the first reliable Automatic Pool Controls, and continues to produce a great product. Hayward makes a very good control system, and it is backed by the Hayward name.