The Honeywell top-fill ultrasonic humidifier has 5 mist settings for a comfortable humidity level. It has a water tank capacity of 1 gallon and moisture output of 1.2 gallons. This HONEYWELL cool moisture humidifier has a nightlight for easy use in low-light conditions. It also runs quietly for a noise-free environment. Best for rooms between 300 and 500 square feet. Owner"s manual included.