Optimus U-31001 1.5-Gallon Cool Mist Ultrasonic Humidifier

1.11 gallon tank capacity | Output of 1.5 gallons in 18 hours | Features a water empty automatic shut off switch and refill light | Adjustable mist volume control | Whisper-quiet operation; won't disturb sleep | Capacity: 4.2 liters | Voltage: 120.0 volts | Included components: Owner's Manual