MK520 Wireless Desktop SetHigh-performance wireless combo puts convenience and control comfortably at your fingertips, whether you use a laptop or desktop. Full-size keyboard gives you the room you need to type comfortably, while the concave Incurve keys™ cradle your fingertips. The full-size mouse offers smooth, precise laser tracking and provides comfort and control with a hand-friendly, contoured design and soft rubber side grips. Hassle-free desktop with up to three years of battery life for the keyboard and one year for the mouse. Logitech® Unifying receiver plugs into your laptop and is compatible with other Unifying devices. For Device Type: Computer; Maximum Wireless Range: 30 ft; Connector/Port/Interface: USB.