Our Commercial oven has 3 heating elements on the top bottom and back of the unit which speeds roasting and is better for baking than the standard oven. The built-in fan which constantly circulates and traps the heat within the ovens stainless steel interior maximizes the ovens cooking efficiency without increasing the temperature. Because the air inside the cooking chamber does not remain static as in traditional bake or roasting ovens the convection oven cooks foods evenly faster and with less energy sealing in delicious flavors and juices.All Stainless Interior and Exterior 1700 Watts of Power Electronic Timer Top Bottom and Rear Heating Elements 6 Function Selector: Defrost Bake Roast Rotisserie Broil and Bake/Extra Roasting/Broiling Rack Extra Large Capacity: Holds a 20 lb. Turkey Accommodates a standard 1/2 Sheet Baking Pan Reversible Chrome Plated Rack Heavy Duty Drip Pan and Rotisserie Set