The New Microsoft Natural Ergonomic Keyboard 4000 in black is a wired USB keyboard that is still sealed. It features a detachable palm/wrist rest and enhanced function keys for improved usability. The ergonomic design is intended to provide a comfortable and natural typing experience, with a QWERTY layout and English language keys. Made of plastic, this keyboard has dimensions of 20 inches in length, 10 inches in width, and 2 inches in height, offering a sleek and functional option for computer users.