USED Logitech USB Nano Unifying Receiver for Mouse Keyboard CU0023.

Logitech Wireless Unifying USB Nano Receiver Dongle for Keyboards & Mice Genuine

Logitech USB Nano Unifying Receiver for Mouse Keyboard C-U0008

Logitech USB Nano Unifying Receiver for Mouse Keyboard C-U0007

Logitech Wireless Unifying USB Receiver Dongle for Keyboard & Mice

NEW SEALED Logitech Unifying USB Receiver Dongle for Keyboard Mouse 6 Devices