Have a MX Mechanical (Danish) (incl Numpad) and one USB receiver M/N CU0021. In the App Logi Options + it would be very nice, if I could see WHAT USB Receiver I have, and with the possibility to Order the same for a second PC with just a few click, fx link to the shop, so I would be sure i buy the right ADDITIONAL one.
Your supportpage is ****. Neither Keyboard S/N was recognized, nor could it find anything to the M/N CU0021 on the stick - thus "Analog"-way no help on your supportpage, of what stick I actually have in my PC right now... Even Youtube or other doubtful webpages gives more suggestions and information... Not what I expect of a company else well renowned like Logitech...