The Keystone 12,000 BTU 115-Volt window-mounted air conditioner with "Follow Me" remote control is perfect for cooling a room up to 550 sq. ft. 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. Money saving features includes energy saver mode, sleep mode and a programmable 24-hour timer. Plus quiet operation (57.7 dB on low) helps you get a good night's sleep.