820-000814 by LOGITECH - Buy Or Repair - Radwell.com
LOGITECH 820-001633 Wave 2.4 Wireless Keyboard No Receiver?? | eBay
820-002864 by LOGITECH - Buy Or Repair - Radwell.com
Amazon.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