Mini Cool Mist Humidifier,IMZ&reg; Portable Night Light Air Purifier, Flexible Dispenser with USB Cable Auto Off,Green LED for Skin Moisturing,Stealth Mask,Baby Room,Bedroom,Office,Spa,Yoga,Car-Blue USB cable power supply, plug it in computer,laptop or with power adapter then it will works. Whisper-Quiet Ultrasonic Operation - humidify your living space to prevent dry, stuffy air and flu/cold germs infecting your loved ones. Prevent dry and chapped skin in dry winter months. Shuts Off Automatically When The Water Runs Out. Portable for Car, Office, Home, Yoga, Office, Spa, Bedroom, Baby Room. Perfect gift idea for family and friends. Mini size that conveniently sits on a desk or dresser or counter. Attractive glow in the dark Night Light helps you easily see the product in a dark room Please use pure water to protect the humidifier, avoiding to use essential oil or other chemical corrosive substances.