Extend a USB port from the back of your computer to your desktop. The USBEXTAA5DSK Desktop USB Extension Cable connects to an available USB female port on a Mac 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 situate a USB port in a more practical spot, such as on top of the computer case or on a desktop.