As you noted, you will need two Unifying receivers - one for the K4 and the 
other for the PC. Be sure to pair both devices (mouse and keyboard) with both 
receivers - it is probably best to have channel one set to one receiver, and 
channel two to the other  on both keyboard and mouse.
After that you will need to switch both the keyboard and the mouse individually 
between the two receivers. The K780 uses the F1, F2 and F3 keys to select its 
current channel. Hold them a while to select the channel you want. Use the 
“easy-switch” button to change channels on the mouse.

You might want to install the Options software on your PC to add functionality 
to your devices. It won’t run on the K4, of course.

If you have any questions, just ask. Yes, there are hams at Logitech, at least 
a few of us…

73,
Jack, W6FB


> On Feb 22, 2022, at 1:59 PM, Bill Ham <[email protected]> wrote:
> 
> I am trying to get a Logitech K780 keyboard and M585 to work with a Win 10 PC 
> and my new 0594 K4. I can only get the Mouse to work on both if I use one 
> Unifying RCVR/Dongle in the K4 and another in the PC. The Mouse will toggle 
> between the devices.  I can get the Kybd working on either the PC or the K4, 
> but not both.
> 
> Any suggestions would be greatly appreciated.
> 
> Tnx & 73,
> Bill - K0KO
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