It has a pot material inspection device, if the cookware is not compatible you will hear a beep and it will display a E1, an error state that tells that the cookware is not compatible. When buying a cookware for the Induction Cooker, try to use a magnet, if it will stick on the cookware you can use it on the Induction Cooker,but not all thick bottom and can be magnetize will work on the unit