Fear no more. These products use the GPS, which relies on a host of satellites to determine where you are. Decide how often you intend to use the system. Inexpensive systems simply plug in to your car's cigarette lighter and are small enough to store in your glove compartment, but they're not as user-friendly. Consider the layout of your car.
Some systems come with a monitor that displays a map.
The monitor is commonly installed on the dashboard or on a pedestal extending from the dashboard. In some cars, such an installation may block air vents or make it somewhat uncomfortable for a passenger to enter or exit the vehicle or sit in the passenger seat. Select a system that features multiple ways of getting to your destination. This can include by address, by intersection, by a personal address book or via a location selected directly from the map. Look for a system that gives you vocal as well as graphical directions.