Sunavo CB-H22 is a double hot plate, which means it has two independent heating elements, each with its own temperature control. This allows you to cook two different dishes at the same time, or to cook a dish that requires two different temperatures. The larger burner ring has a diameter of 7.1in and a power of 1000W, while the smaller burner ring has a diameter of 6in and a power of 800W. This makes the CB-H22 ideal for cooking a variety of dishes, from delicate sauces to hearty stews.