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List of Logitech products - Wikipedia
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
What is Unifying? - Logitech
Logitech Unifying Receiver for Connecting Multiple Devices
Best wireless keyboards 2023: Top Bluetooth and USB models reviewed | PCWorld