Interface : USB3.0/ USB2.0/ USB1.1 Data transfer rate : USB3.0: 5Gbps USB2.0: 480Mbps Port : 4-port Electricity power supply : Power Self / bus powered Self-powered recommendation Power consumption : Below 100mA Dimension of this : W82 × D43 × H20mm Weight : Approximately 53g Package Weight : Approximately 395g Product configuration : This body, USB cable ( 1m) , AC adapter, instruction manual