Heat Controller PS121A Comfort-Aire 12000 BTU Portable Air Conditioner Single Hose Design-Makes it fast and easy to install the unit Condensate Management-Disposes of its own condensate under most conditions so there's no bucket to empty; auto stop provides overflow protection 24 Hour On/Off Timer-Saves energy when the room isn't being used Sliding Adapter-Fits a variety of window sizes as well as some patio doors; makes installation fast and easy Washable Filter-Easy to help maintain indoor air quality, Auto Restart unit will restart with a 3 minute delay to protect the compressor