Glip KX-C04 Aqueous Humidifier, White/Blue Improves air quality and alleviate symptoms of dry air such as dry skin, sneezing, coughing and sinus No filter needed; ultra quiet operation; runs up to 12 hours Auto shut-off when water tank is empty 0.4 Gallon water tank with up to 1.1 Gallon of mist output Suitable for room size of 250 square feet