Solaar' Lets You Manage Logitech's Unifying Receiver on Linux - OMG! Ubuntu
Union Wireless Dongle Receiver Unified USB Adapter for Logitech Mouse Keyboard Connect 6 Devices for MX M905 M950 M505 M510 M525 - AliExpress
ltunify | Tool for working with Logitech Unifying receivers and devices on openSUSE – CubicleNate's Techpad
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
Logitech M235 Wireless Mouse, 2.4 GHz with USB Unifying Receiver
How To Pair Logitech Unifying Receiver With Mouse And Keyboard | Logitech | Get Fixed - YouTube
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