DESC: Microsoft SideWinder Precision Pro is an ultimate joystick! Microsoft's patented digital-optical joystick technology gives you the absolute control to dominate. It delivers continuously-correct calibration, no drift, and the durability of non-moving optical parts, so you move through your game with laser-like precision. ??Program single keystrokes and multiple keystroke moves to joystick buttons for commanding gameplay and exacting speed. Take advantage of the breakthrough Shift button to double the functionality of eight programmable buttons.