What can someone do if they've lost the wireless USB connector to their Logitech keyboard and mouse? - Quora
Logitech 831511-0000 C-BT44 USB PS/2 Wireless Keyboard And Mouse Receiver | eBay
Logitech MK710 Wireless Keyboard (NO RECEIVER) English/French
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
Logitech Unifying Receiver for Connecting Multiple Devices