LOGITECH, INC. 920002553 Logitech® MK520 Wireless Keyboard + Mouse Combo, Keyboard/Mouse, USB, Black | Baumann Paper
Amazon.com: Logitech MK520 Wireless Keyboard and Wireless Mouse Combo — Full Size Keyboard and Mouse Long Battery Life Secure 2.4GHz Connectivity Black : Electronics
User manual Logitech Wireless Combo MK520 (English - 132 pages)