Logitech Unifying Receiver for Connecting Multiple Devices
Connect multiple Logitech wireless devices using same USB receiver
Logitech Unifying receiver - Wikipedia
Connect multiple Logitech wireless devices using same USB receiver
Genuine Tiny Unifying USB Receiver Dongle for Logitech Mouse and Keyboard Can Connect Up To Six (6) Devices w/ Unifying Logo|usb mouse and keyboard| logitech usb keyboardusb mouse keyboard - AliExpress
Ask a Swiss: How to connect a non-Unifying Logitech keyboard & mouse to a new dongle