... wind with low noise,quiet small and easy to use 4 inch safe portable mini usb fan with switch 1.Size: 149 ... . Power: 5V DC USB port6.Metal finger guard:YesPacking:15*10.5*15cmPacking box:We are professional manufacturer of brushless DC ... applicable to machine equipment cooling, heat dissipation, like PC cooling, Car refrigerators, air-conditions, kitchen exhaust fan, industrial ventilation. More than ...