Happy-top 230Ml Lucky Elephant Shape Portable Mini Humidifier Night Lamp USB powered Air Humidifier (Pink) Ultrasonic cool mist operation does not require a filter to run. USB-powered. Adorable elephant design. Mini, portable style. Auto shut off safety sensor. Working time for 3 hours. 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 Fine mist to remove static electricity and reduce the computer screen radiation, reduce air micro layer and smog pollution. On human eyes and skin care role to play, especially for air-conditioned room and play room heating effect humidification reconcile. Perfect for use at Bedroom, Living Room, Car, Home and Office, outdoor travel. Wet room up to 11-20 square meters.