This adorable Crane Ultrasonic 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 11 hours of moisture from a removable 1 gallon water tank. It includes an automatic shut off safety feature when water tank is empty. The Crane Ultrasonic Cool Mist Humidifier - Dog features: Ultrasonic cool mist operation Increases air moisture for easier breathing and a good night's sleep Relieves cough, cold, and flu symptoms, including nasal congestion, dry cough, sinus irritation, nose bleeds, dry skin 1 gallon water tank runs whisper quiet up to 24 hours Mists up to 2.1 gallons of moisture per day Effectively humidifies rooms up to 250 square feet Auto shutoff safety sensor Uses less energy than a standard household light bulb Does not require a filter