When building-in a Sharp® Countertop Microwave Ove n, be sure to use the proper Sharp built-in kit. All Sharp kits provide ductwork to assure proper air circulation around the product. Never enclose a microwave oven so tightly that air cannot circulate around it. It will not function properly in a tight enclosure. Prepare the cabinet or wall opening to provide access to a separate 3-pronged, 120V AC outlet of 15 amps or greater. Not all microwave ovens can be built-in. Check the nameplate located on the inside of the microwave oven for the correct built-in kit.