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, a cushioned palm rest, and 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. It connects via USB and is primarily designed for Windows. Dimensions: approximately 19.8 inches long and 10.3 inches wide.