Specifications:USB power supply mode and DC power supply mode.USB3.0 ultra-high speed transmission rate, transfer rate up to 5Gbps per second.Backward compatible with USB2.0, USB1.1.Hubs and each peripheral device support plug and play and hot plug functions.4-port each overcurrent detection and protection design.Built-in LED indicator shows the USB power supply, DC power supply, USB peripheral device connection status of each USB port in.No need to install any drivers.Compatible for Windows 7/Vista/XP and other operating systems.Type: 4 Ports USB 3.0 Expansion HUBTransfer Rate: 5GbpsConnection Interface: USB 3.0 x 4Compatible Systems: for Windows 7/Vista/XPFeatures: 4 Ports, Plug and Play, Easy to Use, High SpeedUSB Cable Length: 30cm/11.8" (Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x 4 Ports USB 3.0 Expansion HUB