The Intermatic Freeze Protection Control with Rainproof Timer protects your pool or spa equipment and plumbing against freeze damage. The timer will turn on the pump and the heater when the outdoor temperature drops below the temperature set by the adjustable thermostat. This timer is built to withstand extreme temperatures, high humidity, rain and chemicals found around pools and spas. The timer gives automation and protection for your equipment. The Freeze Protection Control with Timer requires an enclosure. Specifications: 240V, Built to withstand extreme temperatures, high humidity, rain and chemicals, Requires an enclosure