Logitech MK540 Full-size Advanced Wireless Scissor Keyboard and Mouse Bundle Black 920-008671 - Best Buy
Logitech K540 Wireless Keyboard With Unifying Receiver Very Good 5465 376329876429 | eBay
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
Questions and Answers: Logitech USB Unifying Receiver 910-005235 - Best Buy
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech Unifying Receiver for Connecting Multiple Devices