The silicone dish sits on a metal warming plate. The dish allows for simple, easy removal of cooled fragrance wax/salt by simply popping it out! The 3 ft cord features an easy on/off dial switch. Forget changing bulbs or struggling to get your wax out of ceramic dishes. This warmer never needs a bulb change. It heats the salt using a warming plate! The silicone dish cools quickly for safer handling.