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 Dongle for Mouse & Keyboard 910-005235 (2 Pack) - Walmart.com
Logitech MK320 Black USB RF Wireless Desktop - Newegg.com
Logitech MK520 Wireless Keyboard Mouse Combo with Unifying
Logitech MK320 Wireless Keyboard + Mouse Combo, 2.4 GHz Frequency/30 ft Wireless Range, Black | OfficeSupply.com
LOG920002836 - Logitech MK320 Wireless Desktop Combo with Media
Amazon.com: Logitech MK320 Wireless Desktop Keyboard and Mouse Combo — Entertainment Keyboard and Mouse, 2.4GHz Encrypted Wireless Connection, Long Battery Life (Renewed) : Electronics