The EH-38 pre-set thermostat is designed to integrate seamlessly with your freeze-free self-regulating pipe heating cables. This thermostat automatically energizes the heating cable at temperatures lower than 3 degrees Celsius/38 degrees Fahrenheit, reducing the risk of frozen pipes while saving energy and eliminating the need to unplug cables each spring. It can also be used to control other electrical devices that need to be activated when the temperature approaches the freezing point. The EH38 thermostat is rated at 15 amps with resistive load at 125V and is UL Listed to US and Canadian safety standards.