Keystone's 12000 BTU extra-quiet portable air conditioner (47 dBA on high and 45 dBA on low) helps you get a good night's sleep. Ideal for bedrooms it has four modes - auto cool dry and fan - to keep you cool and comfortable wherever you need it most. Designed for a room up to 500 square feet features include top auto-swing air louvers 24-hour timer and sleep function. Electronic controls with an LED display and the convenient Follow Me'' temperature sensing remote control make it easy to operate. Omni-directional casters roll the unit easily from room to room. Keystone's portable self-evaporative AC includes a flexible exhaust hose and window venting kit for simple setup.