(TRAIT) Portable Ultrasonic Cool Mist Humidifier Home Air Humidifier Mist Maker Purifier (blue) Increases air moisture for easier breathing and relieve of cough, cold, and flu symptoms, including nasal congestion, dry cough, sinus irritation, nose bleeds as well as dry skin Ultrasonic cool mist operation does not require a filter to run (demineralization filter available)