The PCI Express Riser Card PCE2PCE No 7 USB 3.0 AWM is a port expansion card designed for computers that allows users to add external USB 3.0 interfaces via a PCI Express compatible port. This card provides an easy way to expand the connectivity options of a computer by adding more USB 3.0 ports, making it useful for connecting various peripherals such as external storage devices, printers, and other USB devices. Its compact design and compatibility with PCI Express ports make it a practical choice for enhancing the functionality of a computer system.