The Vollrath - 7277048 - Cayenne® 48 inch Heated Shelf features two zones that keep food hot. People who use the 7277048 model can also achieve up to 33 percent less energy usage, because the product makes it possible to heat the full shelf or just the part that is needed. The shelf has an aluminum core and robust heating controls that offer precise, reliable results. Additionally, the Vollrath Cayenne® 48 inch Heated Shelf (7277048) has easy-to-reach controls on the left side.