The Ultrasonic Aroma Essential Oil Diffuser is an upgraded version. The 2nd generation produces more mist than the old version. An ideal way to add moist, comfortable air to small bedrooms, hotel rooms, tabletops. The outlet shouldn't be inserted cord that exceeds the maximum voltage. Fight back against dry air. This stylish cool mist humidifier adds moisture to your air to eliminate dryness and help with your dry chapped skin, chapped lips, and dry sinuses. Add a drop of your favorite essential oil to give your room a fresh, clean scent. Features include 7 color changing lamps for your choice, a nightlight, programmable on/off cycles, and auto shut off. once the water runs out, it will be auto shut-off to protect the device.