Logitech Unifying Receiver for Connecting Multiple Devices
Logitech's Unifying-equipped Performance Mouse MX and Anywhere Mouse MX track on glass | Engadget
List of Logitech products - Wikiwand
Logitech Nano Wireless Receiver For Logitech Keyboard and Mouse - Newest Revision (DUAL DEVICE / NON-UNIFYING) - HDEtron.com
Logitech MX Master, Wireless Mouse, Bluetooth or 2.4 GHz with Unifying USB Nano-Receiver, Tracking on Any Surface 1000 DPI, 5 Buttons, Amazon Version, Compatible with PC / Mac / Laptop - Black,
Amazon.com: Logitech USB 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 Nano Receiver Free Shipping USA seller (Non-Unifying) | eBay