Panasonic NN-SN744SA. Refurbished Includes 90 Day Warranty . . The Panasonic NN-SN744S is a 1.6 Cu. Ft. Countertop Microwave Oven that has 1,250 Watts cooking power. Its Inverter Technology delivers constant power that results to no more cold spots or rubbery food. With green backlight display color and preset cooking controls, heating up food becomes fast and simple. This microwave also offers keep warm feature, membrane control panel and cooking instructions in english and spanish. . . NN-SN744S.