Keystone KSTAP12NA is a portable air conditioner that can be used to cool, dehumidify, and circulate the air in a room. It has a 12,000 BTU cooling capacity, which is suitable for rooms up to 500 square feet. The unit also has a built-in dehumidifier that can remove up to 50 pints of moisture from the air per day. The Keystone KSTAP12NA has three fan speeds and three cooling modes, so you can customize the cooling to your liking. The unit also has a remote control for easy operation.