- EXCELLENT SHAPE - WIRED USB - ERGONOMIC DESIGN - ZOOM SLIDER - EMAIL AND INTERNET HOT KEYS The Natural Ergonomic Keyboard 4000 from Microsoft is an ergonomic wired-USB keyboard with with a zoom control, an enhanced numerical keypad and Internet and multimedia function buttons. The keyboard connects to your Windows or Mac computer via the USB interface and features a split ergonomic design with an integrated wrist rest. -ASKING $20