The Warm Mist Humidifier is compact yet can increase moisture in indoor areas up to 675 square feet. By outputting up to three gallons of water per day, the unit is easily able to counter the results of dry air. It features auto-on and auto-off modes, triple safety features including a lid lock, control button lock and auto shut-off, which stops the unit if it tilts or runs out of water. Other features include auto and manual operation. Great for home or office use.