Click here for OEM eligibility guidelines The Microsoft Natural Ergonomic Keyboard series has an improved split design allowing natural hand and arm placement. Add the comfort and control of the Microsoft Comfort Optical Mouse, with High Definition Optical Technology, Magnifier and Tilt Wheel and you have superior comfort, performance and productivity. Key Features Microsoft’s Natural® Split Keyboard Design 14° gable reduces wrist pronation Zoom 7° reverse slope for natural wrist posture My Favorites and Multimedia Keys Microsoft High Definition Optical Technology<p>System Requirements Operating System Microsoft Windows 2000 Microsoft Windows XP Microsoft Windows XP Media Center Edition