New Original 6mm Unifying Receiver USB Dongle for Logitech M185 Wireless Mouse and Keyboard
New Logitech C-U008 Unifying USB Receiver MX M215/305/310/315/325/345/505 & More | eBay
Logitech M525 Wireless Mouse – Long 3 Year Battery Life, Ergonomic Shape for Right or Left Hand Use, Micro-Precision Scroll Wheel, and USB Unifying Receiver for Computers and Laptops, Black/Gray : Electronics
Amazon.com: Logitech New Unifying USB Receiver for Mouse Keyboard M515 M570 M600 N305 MK330 MK520 MK710 MK605 : Electronics