Specificatians  1.Product Dimension:327*300*46mm
                            2.4 USB 2.0ports
                            3.ON/OFF  power switch
                             4.Fan Dimension:60*60*10
                             5.Rated Volitage :5V
                             6.Power Current :0.18A
                             7. Rated  Consumption :0.9w
                             8.Rated  Speed :3500
                              9.Airflow:30CFM