To design a more comfortable keyboard, Microsoft conducted extensive ergonomic and usability research. The result is the Microsoft Natural Keyboard Elite. Its split, gently sloped shape encourages a natural hand position-so you can type more comfortably.
Feature Descriptions - Comfortable Shape
The Natural Keyboard Elite allows you to place your hands, wrists and forearms in a naturally comfortable position. Integrated Palm Rest The built-in palm rest provides a comfortable place for your hands when you're not typing.
USB and PS/2 - Use the Natural Keyboard Elite with a PS/2 port or with the Universal Serial Bus (USB) adapter included in the box.