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Keystone's 12,000 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.