USB 4 Port Data Switch. Cheap and simple way to share USB devices amongst different computers. Up to four computers can do the sharing, and if you pop a USB hub in there you’ll be able to let those machines share multiple USB devices. Are you keeping up at the back there? $29.99.
The use of four downstream Ports allows you to connect up to four USB enabled computers. Share a printer, scanner, hard drive and more by depressing one of the selector switches in the front of the device. By depressing a selector switch you activate the use of a peripheral by the computer on that switch.
Your link goes to some Windows Registry program instead of the USB switch.