Since many laptops and ultrabooks are not equipped with a gigabit ethernet port the usb3gig is a valuable add on delivering high speed data transfers via usb 30 featuring a gigabit ethernet port on one end and a usb 30 connector now you can quickly download large files stream movies and get work done plug the usb3gigs usb 30 connector into your laptop and connect gigabit ethernet port to an ethernet cable and router the adapters flexible cord makes it easy to connect even in tight