These electric heaters combine adjustable temperature control with a variable power output selector. This output selector provides three wattage levels for a given thermostat setting and voltage rating. A pilot light indicates when the heating element is activated. Temperature detector is located on the outside of the pail or drum away from the active heating element. Caution: Use heaters with metal pails or drums that contain nonflammable materials only. Also, heaters are only for indoor use in nonhazardous areas.