Stainless steel interior, 0-250 degree thermostat, 120V. Inside diameter 9 3/4".8 3/4" deep. These melters will heat your wax, gel or soap quickly and evenly like a convection oven. The accurate thermostat maintains and even temperture. Double wall construction and fully insulated so that the outside of the melter is cool enough to touch and the heat remains on the inside where you need it. Convection melters are also easy on electricity, can be plugged into any standard outlet and the heating element can be replaced without having to send your melter away to the factory. 30 day warranty.