The MK540 Advanced is an instantly familiar wireless keyboard and mouse combo built for precision, comfort, and reliability. The full-size keyboard features a familiar key shape, size, and feeling - and the contoured and ambidextrous mouse has been designed to fit comfortably into either palm. Connect your keyboard and mouse with one tiny Logitech Unifying USB receiver. You'll get a reliable - and encrypted - wireless connection up to 10 meters away with virtually no delays or dropouts. The keys have been optimized for improved accuracy and reduced noise - and your fingers will immediately feel at home on the familiar key surface and layout. The palm rest and adjustable tilt legs keep you comfortable for long stretches at the desk. The wireless mouse's contoured shape and soft rubber side grips are designed to fit comfortably in either your right or left palm - and enhanced tracking and precise cursor control keep you in command. Convenient and essential hot keys give you direct access to media, calculator and battery check functions. Preset Fn keys can even be personalized in Logitech Options to meet your specific needs. Your keyboard won't require new batteries for 36 months and your mouse stays powered for 18 months. The keyboard is spill resistant to 60ml of liquid and abrasion resistant key printing ensures your keys won't quickly fade.