1.11 gallon tank capacity</br>Output of 1.5 gallons in 18 hours</br>Features a water empty automatic shut off switch and refill light</br>Adjustable mist volume control</br>Whisper-quiet operation; won't disturb sleep</br></br>Product Description</br></br>This Optimus cool mist ultrasonic Humidifier has a 1.11 gallon tank capacity and outputs 1.5 gallons in 18 hours. It features a water empty automatic shut off switch and refill light and has an adjustable mist volume control. It contains a removable transparent tank with handle for easy removal and transprot and has a whisper-quiet operations so it won't disturb sleep.</br><br/>http://www.amazon.com/gp/product/B009CNHF68