Logitech USB Unifying Wireless Receiver (910-005235) - Walmart.com
Logitech MK320 Wireless Desktop Keyboard and Mouse Combo — Entertainment Keyboard and Mouse, 2.4GHz Encrypted Wireless Connection, Long Battery Life (Discontinued by Manufacturer) : Electronics
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
Logitech MK320 Wireless Keyboard and Mouse Combo - 2.4GHz, USB Receiver, Instant Access Hot Keys - 920-002836 at TigerDirect.com