Wherever you are, safty is the heading important, if you don't know more road address and traffic rules, you want to drive car by yourself, with a car gps device is better for you, it will be a good navigation partner. in the inner device of car gps system has invoice of safty funcion, for example the read, green light, the speeding and speed limit road, accident danger area, limited location and so on, if you driving the car in the road, china car gps will notice you with voice or picture to tell driver, not break the tracffic rules, make you safty, the picture will be used all over the world.