Why you should really, really update your Logitech wireless dongle - The Verge
What Is A Logitech Unifying Receiver And How Can You Benefit From It?
Logitech Unifying Software - Download
Logi Bolt USB Receiver for Multi-Computer / Device Use
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