Logitech Unifying Software Download - Control center of the Unifying
Logitech Unified Receiver Update - YouTube
Zone Wireless Plus Unifying + Audio Receiver
Download Logitech Unifying Software - MajorGeeks
Can I downgrade Logitech K375s keyboard firmware? And is there a way to backup the current firmware on the keyboard before I do so? · Issue #2044 · fwupd/fwupd · GitHub
How to Update Your Logitech Unifying Receiver
C-U0007 firmware 012.010.00032 dongles does not accept encrypted keyframes · Issue #1 · bilogic/logitech-unifying-device · GitHub
Amazon.com: Logitech Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics