Air Innovations MH-602 1.6 Gal. Cool Mist Digital Humidifier for Large Rooms &ndash; Up to 500 sq. ft-Blue Permanent Ceramic Filter  Never Needs Replaced Anti-Microbial Tank & Base - Freshen your space with pure, clean moisture Runs Up To 80 Hours On One Tank Designed to operate quietly for uninterrupted sleep 4 mist settings, Auto shut off, and more!