Everybody wants to get the most out of their vehicle. The Bully Dog Watch Dog is the perfect way to begin understanding what your vehicle is doing and how it's performing. This remarkable unit can be installed on most vehicles since 1996*. It gives you a simple way to monitor vehicle parameters like temperature and speed; things you might not otherwise pay much attention to. This is especially important if you've taken steps to modify your vehicle in any way. Knowing and understanding how those modifications are affecting your car's performance is essential. It's also important to be informed of these things when altering your chassis set-up and/or your driving style.