Microsoft Natural Ergonomic Keyboard 4000 Advanced Ergonomic Design Make the move to superior comfort with this breakthrough keyboard design Place your hands & arms naturally & comfortably with the Microsoft Natural Ergonomic Keyboard 4000. The enhanced split design encourages a more natural h&, wrist, & forearm position & its new curved key layout makes keys easier to reach. The Zoom Slider lets you zoom in for close-ups of Web pages, images, & more — with just the touch of a finger. & 5 customisable “ My Favorites” keys give you instant access to the folders, profiles, & Web pages you use most. Gullwing Design • Natural arc mimics the curved placement of the fingertips to reduce key reach • 14-degree gable reduces wrist pronation • Curved key bed designed to provide more direct key strikes for less finger effort Microsoft’s Natural Split Keyboard Design 12-degree angle split for natural wrist alignment Reverse Slope The optional palm lift creates a 7-degree reverse slope for a more natural wrist posture than flat keyboards