The Ultrasonic Humidifier by HoMedics features a large easy-to-remove 5.29L tank. This vaporizer gets up to 65 hours of runtime without needing a refill. It was designed with auto shutoff protection that will power down your unit when the water level gets too low. The mist output is cool, giving your air a refreshing feel. The unit provides micro-fine mist, which is easily absorbed into the air. It features a clean mist anti-microbial technology that helps prevent the growth of mould and mildew on the surface of the tank. In turn, this ensures the mist being vaporized into your air is free of these allergens. This machine functions as a 2-in-1 humidifier and air purifier. It also prevents the buildup of “white dust” caused by hard water that can settle on your floor, appliances, and furniture. FEATURES: •Visible ultrasonic cool mist •1.4 gallon5.3 L water tank with handle •65-hour runtime •Adjustable mist setting •Coverage area: 439 ft240.8 m2 - Great for large bedrooms and family rooms •Night-light with onoff •Auto shutoff when out of water •Clean Tank Technology helps protect the tank from mold and mildew •Includes 1 demineralization cartridge