Amazon.com: Logitech 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 USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug – Dealtargets.com
Logitech M525 Wireless Mouse - Red/Black w/unifying receiver PC Mac | eBay
Logitech's new Mac-specific mouse and keyboards are the new best choices for Mac input devices | TechCrunch
Logitech M325 Wireless Mouse, 2.4 GHz with USB Unifying Receiver, 1000 DPI Optical Tracking, 18-Month Life Battery, PC / Mac / Laptop / Chromebook (NEW BLUE) | Canadian Office Supplies