Air Innovations Cool Mist Dual Tank Digital Humidifier For Large Rooms &ndash; MH-801 Red Designed to operate quietly for uninterrupted sleep. Removes impurities and puts clean, pure moisture back into the air For rooms up to 700 sq. ft. Has 4 mist settings and an auto shut off Permanent ceramic filter, runs 15 hours on low. Auto Safety Shut Off when tanks are out of water. 1-year limited manufacturer's warranty.