Logitech USB Unifying Driver, Specs and Software Download
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
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech Unifying Receiver for Connecting Multiple Devices