- The LCD panel on your laptop is monitor #1
- A second monitor plugged into your laptop's VGA port
- A third monitor plugged into the docking station's VGA/DVI port
If you like to use multiple monitors via the "extended desktop" configuration, then adding a 3rd may not be a bad idea. One of the most cost effective ways of doing this is through one of these docking stations that has VGA/DVI built-in.