This USB 3.0 slot bracket by Delock can be installed into a standard PC slot and extend the system by four external USB 3.0-A ports. So you can connect USB 3.0 devices, such as external enclosure, card reader, memory, etc.. Since the USB 3.0-A interface is compatible to its forerunners USB 2.0 and USB 1.1, you can continue to use their existing USB devices.
