Pairing two Logitech Devices with the same USB Receiver (Windows 10) - YouTube
Logitech Unifying Receiver for Connecting Multiple Devices
Amazon.com: Logitech C-U0007 Unifying Receiver for Mouse and Keyboard Works with Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) (C-U0007) : Electronics
Connecting a Logitech device to your Unifying Receiver (Windows and Mac) - YouTube
What Is A Logitech Unifying Receiver And How Can You Benefit From It?
Logitech Unifying Receiver 1-6 Devices USB Dongle for Wireless Keyboard Mouse 73257010740 | eBay