Ultrasonic cool mist technology: safely moisturizes the air for up to 25 hours of continuous operation depending on mist settings, so you can combat dry air all day long. Ideal coverage for bedrooms, offices and other medium-sized rooms year-round comfort: high and low-speed settings combined with a 360deg. mist nozzle help you consistently balance and regulate the humidity in your home all year long for relief from cold-like symptoms and sinus issues ample room coverage: with room coverage up to 250 sq ft, this 1.5 gallon tank is ideal for bedrooms, living rooms, offices, and nurseries to safely moisturize the air night light & auto shut-off: an optional night light offers a soothing glow, while the automatic shut-off feature turns the humidifier off when water level is low or the tank is removed what you get: humidifier, ac power adapter, disk cleaning brush, user manual, and pure enrichment's guaranteed 5-year warranty. Model PEHUMSIL