Breathe easy with the Homedics cool mist ultrasonic humidifier. It’s great for medium bedrooms & home offices up to 258 sq. ft. The top-fill 0.5-gal. tank features up to 23-hours runtime with auto-shutoff protection. Plus, 3-mist level settings, color changing night-light, and essential oil tray with 3- pads to enhance your ambience.