Air Innovations Cool Mist Digital Humidifier for Large Rooms &ndash; MH-701C Teal Has 4 mist settings and an auto shut off. Designed to operate quietly for uninterrupted sleep. Removes impurities and puts clean, pure moisture back into the air. For rooms up to 600 sq. ft. 5 mist settings: Low, Medium, High, Supreme, Turbo. Permanent ceramic filter  It never needs replaced. Provides moisture for up to 96 hours on the low setting. 1-year limited manufacturer's warranty.