Air Innovations MH-408 1.1 Gal. Cool Mist Humidifier for Medium Rooms &ndash; Up to 400 sq. ft. -Black Permanent Ceramic Filter  Never Needs Replaced Anti-Microbial Tank & Base - Freshen your space with pure, clean moisture Runs Up To 70 Hours On One Tank Designed to operate quietly for uninterrupted sleep Variable mist settings, Rotating mist nozzle, and more!