The USB extension cable worked very well, I recently purchased a wireless keyboard and the signal between the keyboard and the receiver plugged into the PC was lost due to a metal table top[ on the computer desk. Using the USB extension cable I was able to move the receiver to a more faverable location which provided a strong signal.
However. at the same time I ordered the USP extension cable I also ordered a longer Earthnet Patch Cable as the cable that came with a new router was too short. The earthnet cable was defective and did not connect the modem to the router. Considering the low price of the cable I decided it was not worth the cost to return the defective cable. I then purchased an earthnet cable from another source, paid more than twice the price, which did work.