After decades of working with computers, I started to develop some wrist and arm pain a few year ago. So I switched from using whatever random mouse I could find for under $20 to using input devices ...

You can use two Windows machines at once with a single keyboard and mouse without any special hardware. I had an extra laptop lying around that now connects with the same keyboard and mouse as my PC.

Press a few buttons, and you can accomplish hundreds of computer tasks, from simple to sophisticated, without taking your hands off the keyboard ...