9 FUNCTIONS, ONE OVEN: The versatile Oster® RapidCrisp™ Air Fryer Oven combines air fryer oven combines 9 cooking functions in one oven to make preparing family meals quick and easy—it's an air fryer, convection oven, broiler, toaster oven, dehydrator, and more The largest toaster oven on this list is the Hamilton Beach 31103DA Toaster Oven.