SPT SU-3750 Ultrasonic Humidifier, Penguin Type: Humidifier Humidification Capacity: 7.5 liters / day Operates Room Size: up to 450 sq. ft. Water Tank: 1 gallon / 3.75 liters Power Consumption: 28W Power Supply: 120V / 60Hz Dimension: 10 x 11 x 10.25 Weight: 4 lbs.