Nowadays there are either built-in or portable GPS navigator systems in almost all cars. However, only a small percent of car-owners know that a portable GPS navigator like tomtom one is a lot cheaper than build-in GPS in the car. This device doesn’t need professional installation and you are welcome to use it in any vehicle you want. Everything you should do – simply mount it on the dashboard and it will be powered via the cigarette lighter. Frankly speaking, the number of brands and GPS models grows every day, and you definitely need a guide to choose the best portable navigator to suit your needs:

1. First of all – price. Of course, it varies but, as a rule, portable GPS navigators are anywhere from 100 to 200 dollars. Build-in GPS are much more expensive. That is why portable GPS navigator systems are very economical and useful.
2. Even the cheapest portable GPS navigator comes with such features as: the United States map in details, voice guidance, a colour screen, mounting set, and power adapter.
3. Most portable navigators are lack of such sophisticated features as an internal compass, and accelerometer and if you live in an area with numerous tunnels, and high rises, you’d better think of a more expensive model.
4. Reviews. Once you have finally chosen the navigator you like, consult an expert and read recommendations as to its functionality and reliability.
5. Storage capacity. Be sure that you can download some extra maps if you would like to.
6. Antennas are extremely important since namely they ensure the strength of satellite signals and navigation itself.

I hope this guide will help you to choose the best navigator you need.