Sunbeam SUL496-UM Ultrasonic Humidifier has a 24-hour run time. Powerful, easy to operate controls. Equipped with a programmable humidistat control. Sets the perfect humidity level for optimal comfort. Produces a refreshing, cool, visible mist. Incorporated handles located at the bottom of the unit. Micro ban antimicrobial product protection. Filter free operation. Rotating nozzle allows for directional mist. Perfect for medium rooms. .5 gallon output estimate, .65 gallon tank capacity. Run time scale included. Empty tank indicator.