Delonghi RCH150 Retro Ceramic Heater Adjustable thermostat Maintains your desired room temperature Ceramic heating element provides intense directional flow of heat Two variable heat settings to optimize energy-efficient operation Anti-Freeze setting automatically turns the heater "on" when the room temperature drops below 44 degrees fahrenheit Safety Thermal cut-off is one more way to insure product safety. If the unit becomes to warm, it automatically turns off.