Keystone KSTAT12-2C. Brand NewIncludes One Year Warranty. . The Keystone KSTAT12-2C Energy Star 12,000 BTU 230 Volt Through-the-Wall Air Conditioner with "Follow Me" remote control is perfect for cooling a room up to 550 square feet. It has electronic controls with LED display and a temperature sensing LCD remote control allowing you to conveniently see, set and maintain the room temperature from across the room. Plus quiet operation helps you get a good night's sleep. This 2016 Energy Star unit includes an energy saver mode, programmable 24-hour timer and a sleep mode to save you money while keeping you cool and comfortable.. . KSTAT12-2C