Cool Mist Digital Humidifier For Large Rooms &ndash; MH-509 White Up To 400 sq. ft. Imported 14" high 9.75" wide Freshen your space with pure, clean moisture with the Air Innovations 1.4 Gallon Clean Mist Smart Humidifier. Automatic safety shut off turns the unit off when the tank is empty, preventing the motor from burning out. Programmable, digital LED display. Cool Mist Ultrasonic Humidifier 1-year limited manufacturer's warranty.