Pure Enrichment Mistaire XL Ultrasonic Cool Mist Humidifier Up To 500 Sq ft *NEW IN BOX* Long-Lasting Dry Air Relief: Ultrasonic cool mist technology safely moisturizes the air for 10 to 24 hours of continuous operation (depending on mist control setting) so you can breathe easily and get more restful sleep 1 Gallon Water Tank: Large tank and powerful steam output provides ideal coverage for large bedrooms, offices, living rooms, nurseries, and more, up to 500 square feet Year-Round Comfort: Variable mist settings combined with a 360 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 Night Light Auto Shut-Off: An optional night light offers a soothing glow with 3 color options (red, blue, and green), while the automatic shut-off feature turns the humidifier off when water level is low or the water tank is removed What you Get: Humidifier, disk cleaning brush, two mist nozzles, user manual.