This hot plate style candle warmer has a great auto shut off feature. The warmer can be used to heat up wax in a jar or dish with a wax melt. Once the wax is liquefied the fragrance will spread into the room. After 8 hours the power shuts off until you unplug the unit and plug it back in. This can also be used with our cast iron skillet to melt scented wax pieces. Using one of these kinds of burners is also a great way to use up the left over wax from pillar candles instead of throwing it away. Our 16 and 26 ounce jar candles will fit on this unit.