Place your hands and arms naturally and comfortably with the microsoft natural ergonomic keyboard 4000. the improved split design encourages a more natural hand, wrist, and forearm position and its new curved key layout makes keys easier to reach. the zoom slider lets you zoom in for close-ups of web pages, images, and more — with just the touch of a finger. and 5 customizable "my favorites" keys give you instant access to the folders, files, and web pages you use most.