This is a poorly made product. We used it for Thanksgiving and put it on a wooden dining room cabinet only to discover that it isn't insulated on the underside so it melted the finish on the wood. when I realized that it was too hot on the underside I put a thick place mat under the warmer then it melted the underside of the place mat into the wooden cabinet. Also, it is either on or off, and the heat level cannot be controlled, so there was no way to lower the heat and still keep it on. It's only virtue is that it is larger than the other warmers so it can hold more. I was very disappointed and very sorry that I bought it.