The Delock PCI Express card expands your PC by three external USB 3.0 ports as well as one internal USB 3.0 port. You can connect USB 3.0 devices like e.g. docking station, card reader, external enclosure etc. to the card. Since the USB-A interface is compatible to its forerunners USB 2.0 and USB 1.1, you can still use your existing USB devices.