Microsoft Natural Ergonomic Keyboard 4000 - Wired - Split ergonomic design encourages natural hand, wrist, and forearm positions - Cushioned palm rest provides support and promotes a neutral wrist position - Palm lift promotes a relaxed, natural angle for your wrist - Media keys for music and video control.Users of Mac OS X v10.2.x must install enclosed IntelliType Pro and IntelliPoint - software before connecting the hardware I bought it in 2015 at price of $56+ (plus $3.5+ sales tax) and use it in my office most of the time. The office is now closed and so I decided to sell it. I'm asking $38 (~65% of the original price) and you will also save the sales tax. It is still in excellent condition with original box, except for normal wear and tear. Venmo/cash accepted Pick up in Mountain View (contactless). Amazon Link: