A:Answer This is an extender for the usb receiver that plugs into the computer. Originally I had my usb receiver plugged directly into my computer, but it was behind the couch I was using the keyboard from and I was having all sorts of problems with the keyboard not picking up keyboard strokes properly. I then used the extender cord which allow me to move the receiver closer to the front of my couch and it works great. Even without physically moving the receiver, the extender cable boosts the signal of the receiver and greatly increases the range. If you don't currently have any problems, probably no need to use it, but I would definitely save it in case you encounter problems later.
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