Logitech Wireless Keyboard and Laser Mouse with Nano Transceiver MK520 (Certified Refurbished) This Certified Refurbished product is tested & certified by Logitech to look and work like-new. The product includes all original accessories, and is backed by a 90 day warranty Wireless multimedia keyboard and Laser mouse 107-key QWERTY layout Up to 3-year battery life Laser sensor