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 * 1 gallon water tank runs whisper quiet up to 24 hours * Puts out up to 2.3 gallons of moisture per day and effectively humidifies rooms up to 250 square feet * "Auto shutoff safety sensor and 360 degree output nozzle， 360 degree mist nozzle and variable control settings"