The name of this warmer fits the color perfectly. The gray color is embossed with all kinds of botanical patterns. Use plug in tart burners to melt our scented wax tart to freshen the air in small rooms in your home. A low watt light bulb is used to heat up the wax, liquefying it and releasing the fragrance. There is a switch right on the front to turn the warmer on and off easily. This warmer can be used with both our soy wax and paraffin wax melts. Our round paraffin melts should be broken in half before putting them into these plug in warmers or the wax could overflow. This tart warmer can be used in either vertical or horizontal receptacles because the plug can be rotated.