How to Connect your Logitech Keyboard using Bluetooth | MX Keys, Pop Keys, K860. - YouTube
Re-Program your keyboard & mouse receiver with Logitech Connection Utility - YouTube
How to Pair a Logitech Keyboard
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