A keyboard wedge is a "Y"-shaped splitter cable. To install, simply unplug your keyboard from your computer. Now plug one side of the "Y"-shaped splitter cable into the keyboard port of your computer, and plug the keyboard back into the other side of the "Y"-shaped splitter cable. Now anything that you scan will enter your application exactly as if you had typed it in via the keyboard. No software or drivers required. Plug-and-play easy.