portable fan,usb fan,laptop fan,usb fan,mini fan,desk fan 1.4 inch usb fan 2.Rotational speed 2500prm,5V/12W 3.Metal material ... :Popular air cooling USB car fan, portable fan, mini usb fan, portable usb fan, 4" portable fan, cooler fan, USB fan, desk fan Brushless motor make it lower ... use.Specification: Model No.UF-401Voltage/Power5V/2W for computer, 12V/3W with adapter useSize of item4 inchSize of ...