This Honeywell Ultra PlusTM Cool Mist humidifier is a cool mist humidifier, and produces a fine, visible cool mist with a dual direction mist outlet. It has an ultra-quiet operation and an adjustable digital humidistat with 4 preset comfort levels to let you customize the moisture level in the air, making it a great choice for your family, even as a kids or baby humidifier. Plus, it has an essential oil tray, large tank opening that makes it easy to fill and clean, no filters to replace and it automatically shuts off when empty. It features an up to 40 hour run time.