Electric Heater Base For WatererProduct Description Electric Heater Base For Waterer Ingredients Key Features Helps prevent water from freezing in temperatures as low as 10 degrees f. Designed for use with double wall founts and other metal containers. Perfect for outdoor use in a dry, sheltered area, cord should be protected from animals, use with a ground fault protector. Unit will not draw electricity until temps drop below freezing, uses less than 1 amp per hour.