The Vicks germ free humidifier helps give relief to you or your little one from cold, cough and flu symptoms. It uses UV light to kill up to 99.9% of the bacteria, mold and germs in the water before producing the mist. This cool-moisture humidifier creates continuous germ-free mist for about 2 hours. It has 3 different fan speeds for the desired humidity output. The self-regulating evaporating system easily controls moisture levels depending on the temperature. This electric humidifier comes with a Kaz Protec WF2 filter for purifying water and the filter can be replaced. The 1-gallon water tank and can work for a maximum of 24 hours.