Cool Mist Humidifier, WinTech Mini Humidifier - Portable Humidifier - Travel Humidifier - Personal Humidifier - USB Humidifier (white) Well-Designed: Small and portable, it can work everywhere by connecting to a USB port, like office, car, air-conditioned room Strong Performance: The gentle, fresh, comfortable and pleasing mist releases directly once you turn it on, it will help you get away from dryness, itchiness and irritation. Double-Choice: Press the on/off switch,Blue light means the continuous mist,30ml/h,which can last 6-hour work, Red light can last 9-hour by intermittent mist,10ml/h Auto Shut-offHumidifier will shut off automatically when lacking of water in order to protect the user and device Intelligent Work:180ml big water capacity with waterproofing design, more importantly, you even cant notice the soft humming sound when it is working