Smart nav is a sat nav system, has the traffic master logo on the button, u hold it down, connects you to the call centre, you tell them where your going and they down load the route to your car, its pretty good, i used to fit them and had one in my car, also uses the traffic master cameras at the side of the road to route you round any problems! all you will prob have visable in the car is only the button
http://www.smartnav.com/