Built for precision, comfort, and reliability, the Logitech MK540 Advanced keyboard and mouse combo is the perfect choice for business users. The full-size keyboard features a familiar key shape, size and feeling for a precise and comfortable typing experience. Its spill-resistant design means small accidents are nothing to worry about. Other features: Keyboard: - Familiar key shape size and feeling - Splash-proof design - 3 tilt positions Mouse: - Smooth optical tracking - Optical 2D scroll wheel - Scrolling: Line-by-line