Ultrasonic humidifier with included demineralization cartridge features a rotating mist outlet to deliver a filter-free, cool visible mist into the air. Removable tank with a comfort grip handle allows clean and simple refills at the sink. Variable output control lets you choose the setting that's just right for you. Auto shutoff turns off the humidifier when the tank is empty to prevent wasting energy. Ultra-quiet operation works quietly in the background for distraction-free performance. Humidifier is designed for use in medium-size rooms.