Keystone KSTAT12-2B 12,000 BTU 230V 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) Special 230-volt electrical outlet required (Unit will not work with a standard 115V 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