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
Logitech Silent Wireless Mouse, 2.4 GHz with USB Receiver, 1000 DPI Optical Tracking, Ambidextrous, Black - Walmart.com
Amazon.com: Logitech Unifying Receiver USB Dongle for Logitech M185 Wireless Mouse and Keyboard : Electronics
What can someone do if they've lost the wireless USB connector to their Logitech keyboard and mouse? - Quora
How to Connect a Logitech Wireless Mouse to a Unifying Receiver