The Delock PCI Express card expands your PC by two external USB 3.0 ports. You can connect USB 3.0 devices like e.g. printer, scanner, MP3 player, CardReader, 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.n- 2 x external USB 3.0 specificationn- Data transfer rate up to 5 Gbpsn- Downwards compatible to USB 2.0, USB 1.1, whereas a higher data transfer rate of 5Gbps can not be reachedn- Power output: +5V/ max. 900mAn- PCI Express x1 standardn- Supports PCI Express 2.0 specification.