The Intermatic Dual Timer is a heavy duty dual timer built for pool/spa freeze protection control. The dual timer is designed for pools requiring one or two switches, and protects your pool and spa equipment against freezing temperature damage. The timer turns the pump and heater on when the outdoor temperature drops below the temperature set by the adjustable thermostat. The timer features a 4/8 breaker base and has a provision to install switches inside or a GFCI receptacle on the side of the enclosure and features heater protection. Specifications: 240V, Height: 16.5-inches, Width: 10.875-inches, Depth: 4.25-inches, Housing: Rainproof, Thermostat Range: 32 to 44 Deg. F