Startechcoms 4 port usb 20 hub expresscard allows you to add four usb 20 compliant ports to a host computer using an available expresscard slot and is backward compatible with the usb 11 specification for use with older usb peripheralseasily installed this devices offers combined usb data transfer rates of up to 480mbps ensuring a strong connection with mp3 players digital cameras external cddvd rom drives and much more