LOGITECH C-UAK42 SECURECONNECT Wireless USB Mini Receiver 831842-0000 MX Dongle $19.95 - PicClick
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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 Mini Receiver C-UAK42 Wireless Keyboard/Mouse USB Receiver Dongle - Ryan & Troy Tech Solutions