Microsoft Natural Ergonomic Keyboard 4000

This is a Microsoft Natural Ergonomic Keyboard 4000. It's a wired, split-design ergonomic keyboard with a curved key layout and a cushioned palm rest. It also has an optional palm lift for a reverse slope. Features include a "Gull Wing" design, a zoom slider, media keys, and five customizable "My Favorites" keys. The design helps improve hand, wrist, and forearm posture to reduce strain and fatigue. The keyboard uses a wired USB connection and is primarily designed for Windows. Dimensions are approximately 19.8 inches long and 10.3 inches wide.