Let me go into a little more detail. These 3 PCs will never be all powered on at once. Living on solar power, every amp hour wasted is an issue, so even the vampire power to keep the CMOS battery powered by AC is something I have to avoid. Thus something like Synergy will not be the ticket because Synergy uses one "master" computer that must be powered on to switch from computer to computer. Microsoft also has "Mouse Without Borders", but again, that system is for when all the computers are on and you switch from PC to PC. What I need is a keyboard and mouse with a USB dongle, like most of them are, that are on the same frequency, so all 3 PCs have a dongle in them that can be paired with the one keyboard and mouse. That way one keyboard and mouse will be paired with the dongles in all 3 PCs. Logitech has a "unifying receiver", but after 45 pairings, they stop working and according to Logitech's web page they cannot be paired again after that 45 uses are exhausted.

I am going to call Stardock and talk to them about this. I used to use their monitor extender and it worked well. What I am trying to do is essentially backwards from how a traditional KVM works. Most of them are extremely touchy about using wireless, and I have tested with mine. The connection to one then the other then the other was tenuous at best. It would work once, then not work, then work twice, then not work.... Plus, it STILL required cables from the KVM to the computers and I am trying to avoid that. If I have those cables running from a KVM to the hardware, I may as well just have 3 complete sets of peripherals. I'll get it done somehow!!