Startechcom usb 20 extension cables startechcom usbextaa5dsk this desktop usb extension cable from startechcom connects to an available usb female port on a macreg or pc computer allowing you to relocate the usb female port up to 5 ft away from the computer case by extending the usb port away from the computer case you can site a usb port in a more practical spot such as on top of the computer case or on a desktopa perfect solution for accessing digital cameras mp3 players usb