This Crane Cool Mist Humidifier provides additional comfort to cold symptoms, dry itchy skin, and chapped lips. The whisper quiet humidifier won"t disturb sleep and operates on a low power consumption providing min. of 18 hours of moisture from a removable 1.5 gallon water tank. It includes an automatic shut off safety feature when water tank is empty.Crane Ultrasonic Cool Mist Humidifier - Health, Happiness, Humidity * Whisper-quiet operation * Auto-off function when water tank is empty * Variable mist output control * Removable water tank * Variable humidity control feature * Power-on light indicator * 30-watts power * Water tank capacity: 1.5-gallon or 5.5-liter * Running time per tank: minimum 18 hours * Moist output: 2.1-gallon or 7.56-liter per day * Accommodates rooms up to 250-sq. ft.