1.Unique appearance 2.powered by usb 3.Convenient to carry 4.logo can be printed 5.CE,Rohs certified Portable humidifier,Colors:white,pink,green,blue,orange,Dimension: 2.5x2.5x13.5cm,Feature:USB power,Water shortage protection,small, portable,it will turn off auto each 3 working hours later, will make alarm sound if haven't water in the cup. 2013 mini usb portable air humidifier