PreciseAir Convection System - Delivers even air and heat circulation for superior baking and roasting results. Single/Multi-Rack Convection Bake - Provides ideal airflow throughout the oven ensuring optimal results on both racks. Hidden Bake Oven Interior - Hides previously exposed bottom element to deliver a clean interior appearance. Lower Oven - Offers an additional 1.2 cu. ft. of capacity for convenient baking from 140 degrees to 450 degrees. 12inc/9inc/6inc Tri-Ring Element - Provides three cooking areas in one for the ultimate in cooking versatility. Self-Clean Oven - Conveniently cleans the oven cavity without the need for scrubbing.