The Perfect Aire 1.3 gal. tabletop micro mist ultrasonic humidifier produces a visible, cool mist, has no filters to replace and has a 1.3 gal. antimicrobial water tank capacity. The easy-fill tank is specifically designed to fit under bathroom style sinks with a small tolerance between the spout and sink bottom. The unit has a 12- to 36-hour run time and a special night light feature option that can be turned on or off with the simple press of a button. The 30w unit has mechanical controls and puts out 2.2 gal. of water per day (10.8 OZ/hour). Ultrasonic humidifiers add moisture to the air to prevent dryness that can cause irritation in many parts of the body. They can be particularly effective for treating dry skin, nose, throat and lips and can provide relief from symptoms of the common cold and flu.