The height adjustable Fellowes Office Suites Underdesk Keyboard Drawer converts a conventional desk to an ergonomic workstation! Moves keyboard and mouse off the desktop to save workspace. Unit is easy to install and offers three different height adjustments to suit preferred work position. Mouse tray mounts on right or left side of keyboard tray or stows underneath keyboard tray when not in use. Keyboard stopper holds keyboard securely in place while you work.