Return essential moisture to dry air in your home with the Vicks filtered cool Moisture humidifier. Ideal for medium-size rooms, This quiet personal humidifier delivers invisible, soothing Mist for everyday comfort. Featuring two output settings, this air humidifier has a self-regulating Evaporative system that automatically adjusts the output for maximum effectiveness, and it can operate for up to 24 hours on the low setting. The mist Humidifier features a 1.1-Gallon tank that is easy to fill and clean, and it includes a wicking filter that removes minerals and impurities from water for cleaner moisture. The Vicks filtered cool Moisture humidifier accepts two Vicks VapoPads so that you can add soothing vapors to your mist. Do not block intake or output vents.