1. Car navigation products purchase
Navigation products overall performance of the bleak situation, experts suggest, should be
passed as soon as possible to promote the introduction of national standards for satellite
navigation equipment, the establishment of the navigation performance threshold, out of those
convenient products to consumers. The same time, through the implementation of the
certification system of navigation products, allow consumers to recognize the superior
performance of the product, to avoid low-quality navigation products import lost.
1) chip election: navigation products, we are most concerned about the absolute received star, ie,
the signal reception. Currently on the market most of the automotive GPS will SiRFStarIII
third-generation chip, the advantages of such chips have obscured and adverse weather
conditions can capture and track the signal to reduce the interference of skyscrapers brought.
In addition, the chip is good or bad is directly related to the fast and accurate calculation of the
path is good or bad. Go to the same destination, the chip may appear different route, we need
the best route.
2) The election map: electronic navigation map is another important component of the GPS
navigation systems rely on the work of electronic navigation map is correct or not directly
determine whether the owners more quickly, more easily reach their destinations. In the current
market, whether domestic or fully imported car GPS products built-in map is nothing but only a
few map of the resources, the quality is uneven, and often can not update the map information
to the user inconvenience.
In general, regular brands of GPS navigator will provide one year of free updates, or according to
the number of terms, support 2 times around the free update service. After this update the map
you need to pay a fee, in general, the map updates for GPS map provider to maintain the
half-yearly level, there are some manufacturers to update the data once every three months, the
updated cost of the hundred or so. Upgrades through the network to download, but also
relatively simple.
3) Select speed: the speed mentioned here, including the speed of closing star, boot speed and
reaction speed. Should always pay attention to safety due to the car and the car moving at high
speed, so speed can improve the accuracy of vehicle navigation, but also can save the user's
operating time, saving time and more peace of mind.
4) Select brand: buy big brand products not only their own quality assurance, but also can enjoy a
free upgrade service for a certain number of years. International brands include any of my travel
series we are familiar with the Garmin, Mio the Dentsu mio series, as well as from Europe and
TW brands like NAVMAN and Leadtek, of course, Nokia join the board GPS even more attention.
Election brand is actually selected aftermarket GPS navigation products, the follow-up service is
more important, because the map is updated in real time. Different vendors, access to map data

2. from different sources, free updates are also a variety. Do understand the time of purchase, avoid
the use of do not avoid trouble.