The Crane Cool Mist Humidifier has an attractive drop shape and blue tank. The humidifier's variable mist output control can be adjusted to suit your environment. The device features whisper-quiet operation and turns off automatically when the tank is empty. A light indicates when the power is on, and the tank can be removed for easy cleaning. The humidifier is energy efficient, using less energy (32 W) than a regular household light bulb, while controlling humidity in a room up to 250 sq. ft. With its 0.9 gallon tank, this humidifier can operate for a minimum of 11 hours for ideal comfort.