Use ultrasonic humidifier for relief of cold and flu symptoms. Superfine mist restores moisture to dry indoor air for healthful living. Variable mist control allows you to regulate the humidity level in the room for maximized comfort. 1.2 gallon capacity lasts for up to 20 hours per filling. Directional mist outlet allows you to control the plume. Humidifier features Vicks vapor therapy with integrated scent pad and removes minerals and other impurities from the water.