The product guards against problems caused by dry air in the home. It features an easy to fill a large 2-gallon tank, ideal for use in medium to large rooms. A UV-C Light reduces germs to emit a cleaner mist while Silver Clean™ Protection is embedded in the tank to fight the growth of mold and mildew on the surface of the water tank. Thanks to ultrasonic technology, it disperses a fine mist into the air and is ultra-quiet making it ideal to have on while you sleep. This humidifier has an optional aromatherapy tray so a few drops of essential oil can be added to create a relaxing atmosphere. It is equipped with the option for warm or cool mist and 3-speed settings. A low water indicator light lets you know when it's time to refill the water tank. It also features a soft glow night light and a timer. PureGuardian® humidifier creates a better home environment for those suffering from colds, allergies, and dry skin.