LOHOME USB Mist Maker, Mini Portable USB Donut-shaped Floating Humidifier Aroma Diffuser Air Purifier Humidifier (Blue) Powered by any USB port; Convenient to use anytime and anywhere. No fixed water tank, no filter, so easy to clean and even prevent bacteria. Clean the air, eliminate static, reduces computer radiation and dryness made by air-condition. Increase indoor air humidity; let your skin enjoy the moisture with the fine water grain. Ideal for Office, Home, Car, Travel, Planes, Trains, Nightstand, Hotel, Bedroom, Living Room, Beauty Salon, SPA, Yoga, Conference Room, Reception Center, Baby Room, Magic Stick Style.