The WallMaster WCT12A30B Cool Only Thru-The-Wall Air Conditioner is feature packed with durable, commercial-grade construction, QuietMaster technology, voice compatible integrated Wi-Fi control through the FriedrichConnect app and is a perfect fit for existing 27" air-conditioning sleeves. Designed utilising a rotary compressor, this air conditioner remains quiet while providing commercial grade quality and durability. For your convenience, these units offer three speeds, witha 24-hour timer and even an eletronic defrost control. The WallMaster provides all of this while remaining environmentally-friendly and eadily maintainable.