Wireless USB Unifying Receiver Dongle For Logitech K350 K340 N305 K800 – Magconn
Logitech Wireless Keyboard K350 - YouTube
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