The Crane Elephant Cool Mist Humidifier is a unique product designed to improve your child's health by improving air quality, increasing moisture in the air and reducing the levels of dust and bacteria in the air. This Crane humidifier features a child friendly design, variable humidity control and whisper quiet operation thanks to its rapid vibration humidifier construction. The unit features an easily removable 1 gallon tank for up to 11 hours running time with a total output of 2.1 gallons of moisture per day. Low power consumption: Humidifier operates on 120 volt circuit, 60 Hz, only requires 36 watts of power. Safe and healthy: Supports easy breathing for you and your little one and works year round. Auto shut off: Humidifier automatically shuts off when reservoir is empty, saving power.