IMMEDIATELY NATURAL. SIMPLY ADVANCED. MK540 Advanced is a wireless combination of conventional-style keyboard and mouse that delivers precision, comfort and reliability. The full-size keyboard has the usual key layout, shape and size. And the contoured mouse is designed for comfortable use with either hand. COMBINATION WIRELESS PLUG AND PLAY Connect your keyboard and mouse with a tiny Logitech Unifying USB receiver. It offers a reliable (and encrypted) wireless connection, up to 10 meters away, with virtually no delays or interruptions. TYPICAL TYPING EXPERIENCE The keys have been optimized to improve accuracy and reduce noise. Your fingers will easily find their place thanks to the layout and surface of common keys. The hand rest and extendable legs with adjustable tilt contribute to comfort during periods of prolonged use. COMFORTABLE CONTOURED MOUSE The wireless mouse s contoured shape and soft rubber coating are designed to fit comfortably in either the left or right hand. And improved tracking and precise cursor control make it easy to use. PRODUCTIVITY IN YOUR HANDS Convenient, essential quick access buttons speed up the use of multimedia, calculator and battery checking functions. Fn key presets can be configured in Logitech Options to meet your specific needs. RELIABLE AND HASSLE-FREE The keyboard will run on the same batteries for 36 months, and the mouse batteries will last up to 18 months. The keyboard resists splashes of up to 60 ml of liquid, and abrasion-resistant keystroke prevents character fading.