The usb3sext5dkb black desktop usb 30 extension cable connects to an available usb female port on a macreg or pc computer allowing you to relocate the usb female port up to 5 feet away from the computer case by extending the usb 30 port away from the computer case you can situate a usb 30 port from the computer in a more practical spot such as on top of the computer case or on a desktop the extension cable features high quality shielded twisted pair stp construction