Amazon.com: Logitech C-U0007 Unifying Receiver for Mouse and Keyboard Works with Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) (C-U0007) : Electronics
Best Buy: Logitech USB Unifying Receiver 910-005235
Official Logitech Unifying Receiver for Mouse and Keyboard C-U0007 – Games R Us Live