Integrated hygrostat supports exact humidification for room sizes up to 500 sq. ft. Automatic off action when the tank is empty reduces energy consumption Silent operation so you are not disturbed LED control lights that can be dimmed to night-mode Fragrance dispenser to distribute your favourite fragrance Output: max. 3.5 (13 litres) gallons per day / Tank capacity: 1.5 gallon (5.6 litres)