Panasonic NN-SN975S. Refurbished Includes 90 Day Warranty . . The Panasonic NN-SN975S is a 2.2 Cu. Ft. Countertop Microwave Oven that has 1,250 Watts cooking power. The Inverter Technology delivers a seamless stream of cooking power even at low settings for precise cooking that preserves that flavor and texture of your favorite foods. . . With the Genius Sensor cooking button, this microwave takes care of creating a great meal by automatically adjusting power levels and cooking or defrosting time.