Logitech 920-002836 Wireless Desktop MK320 2.4GHz Keyboard and Mouse
Amazon.com: Logitech USB 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
List of Logitech products - Wikipedia
USB Receiver Recepteur LOGITECH C-U0006 810-001811 FOR MK320 WIRELESS KEYBOARD | #1792398332
Logitech MK320 Desktop Wireless Keyboard with its USB Receiver, No Mouse, Tested | eBay