Take note if you are a using a Logitech Unifying USB dongle, they are wildly insecure - HardwareZone.com.sg
Logitech M720 Triathlon Multi-Device Wireless Mouse, Bluetooth, USB Unifying Receiver, 1000 DPI, 8 Buttons, 2-Year Battery, Compatible with Laptop, PC, Mac, iPadOS - Black - Newegg.com
Logitech Unifying Mice
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
How to pair more than one device with a Logitech receiver
Logitech's Unifying-equipped Performance Mouse MX and Anywhere Mouse MX track on glass
Logi Bolt is a New Receiver to Connect Work Mice, Keyboards | Digital Trends
Solaar' Lets You Manage Logitech's Unifying Receiver on Linux - OMG! Ubuntu
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