The Heated Black Glass Shelf is a built-in shelf with a ceramic glass surface that provides uniform heat. It has a thermostatic control with a lighted on/off rocker switch, allowing you to adjust the temperature between 100° and 200°F. The shelf is cULus and UL EPH Classified, meeting safety and sanitation standards. This shelf is ideal for use on pass-through areas, buffet lines, and as hors d'oeuvre displays. It features a lighted on/off rocker switch for easy operation. Portable models come with a 6-foot cord and plug for convenience. The ceramic glass surface is thermostatically-controlled and heated, ensuring even heat distribution. The surface temperature ranges from 100° to 195°F for portable models. An optional angled food stop is available for portable models to keep the product on the heat zone. The shelf is made of approved foodsafe material, allowing you to place food directly on the glass surface. It comes with an attractive trim mounting ring in stainless steel or Designer Black. Built-in models include a control box with a 3-foot conduit and 6-foot cord and plug. They are recommended for use in metallic counters, but can be used on other surfaces as long as they are suitable for high temperatures. The Standard Built-In model can reach temperatures up to 200°F, while the High Watt Built-In model can reach temperatures up to 257°F. Please note that Hatco is not responsible for any counter damage caused by the heat from the warmer. Options available at the time of purchase include portable models, angled food stop, and different sizes ranging from 24 inches to 72 inches. The trim ring can also be customized with a Designer Black Powdercoated finish. Built-In models have additional options such as a unit without a trim ring, a built-in shelf with a recessed top, and different control box options. The trim ring and conduit length can also be customized. Overall, the Heated Black Glass Shelf is a versatile and reliable option for keeping food warm and displaying it in an attractive manner.