Logitech K380 79-Key Compact Multi-Device Wireless Bluetooth v3 Keyboard - Gray (Certified Refurbished) Certified Refurbished product is tested & certified by Logitech to work like-new. The product includes all original accessories, and is backed by a 90 day warranty. 79-Key Layout, Wireless keyboard that connects to all Bluetooth wireless devices that support external keyboards Recognizes each device and automatically maps keys to give you a familiar layout with your favorite shortcuts Lets you connect to up to three devices simultaneously, Compact and lightweight design Wireless Range: 10 m (30 ft), Battery Life: 24 months