Keystone KSTAT12-1B 12,000 BTU 115V Through-the-Wall Air Conditioner with "Follow Me" LCD Remote Control Energy efficiency rating: 9.8 12,000 BTU air conditioner for through-the-wall installation (Not suitable for window installation) Uses standard 115-volt electrical outlet Cools a room up to 550 sq. ft. with dehumidification up to 2.5 pints per hour Electronic controls with LED display allows you to easily select options with the touch of a button