Keyboard works, plugged into my laptop and tested it to ensure that each key input works. Other than that, this was new in box, and that's the only usage it's ever seen. Original exterior box is thoroughly beat up, but interior box is in perfect condition.

The Microsoft Natural Ergonomic 4000 (B2M-00012) Wired Keyboard is a sleek black keyboard designed for comfortable and efficient typing. With a QWERTY layout and multimedia integration, this keyboard offers a seamless user experience. The ergonomic design helps to reduce strain on the wrists and fingers, while the wired USB connectivity ensures a stable and reliable connection to your computer. The English language keyboard is 19.8 inches long and 10.3 inches wide, making it suitable for most standard keyboard setups. Ideal for those looking for a high-quality and comfortable keyboard for everyday use.