Logitech Cordless Desktop S510 Keyboard and Mouse Combo at TigerDirect.com
Logitech S510 Cordless Desktop Keyboard and Laser Mouse 967557-0403
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 S510 Cordless Desktop Keyboard and Laser Mouse 967557-0403
Amazon.com: New Logitech Unifying USB Receiver for keyboard K230 K250 K270 K320 K340 K350 K750 K800 : Electronics
List of Logitech products - Wikipedia
User manual Logitech Cordless desktop S510 (English - 2 pages)