Hayward SAS Salt & Swim Electronic Salt Chlorination System for In-Ground Pools Provides consistent sanitization, delivering water that wont irritate eyes, dry skin or cause fabrics to fade Eliminates harsh chlorine odors while creating unbelievably soft water Automatically converts dissolved salt into chlorine, drastically reducing maintenance time, and avoiding the constant mixing and measuring of factory produced liquid or tablet chlorine chemicals Cut your chlorine costs over the years by 50% or more SALT CELL SOLD SEPARATELY (Part # SAS-CELL) You MUST purchase both the cell and the controller in order for the system to work!