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　　Chip

　　As a navigation product, we are most concerned about its stars, that is, signal receiving capacity. Most of the car GPS sold on the market currently uses the third -generation chip of Sirfstariii. The advantage of this type of chip is that they can capture and track signals in the case of harsh weather and reduce signal interference caused by high -rise buildings. In addition, the quality of the chip is directly related to the calculation path, which is fast and accurate. To go to the same destination, different chips may appear different routes, and what we need is the best route.

　　Choose a brand

　　Not only are the quality of the purchase of a big brand, it is not only guaranteed, but also a free upgrade service for a certain period of time. International brands include our familiar Garmin Renyou series, Yuda's MIO series, and brands such as Navman and Litai from Europe and TW. Of course, the addition of Nokia has also made the car GPS more concerned. Domestic brands are even more endowned, such as Newman, Patriot, Patriot, New Science, Wanlida, Austrian, God Walker, Guide God and other brands. In fact, the brand selection is actually selected. For GPS navigation products, subsequent service problems are more important, because the map is updated in real time. Different manufacturers have different sources of map data, and there are many free updates. To understand it when buying, you can avoid some troubles that do not avoid after use.

　　Choose map

　　Electronic navigation maps are another important component of GPS navigation device. Whether the correctness of the electronic navigation map directly determines whether the owner can reach the destination faster and easier. In the current market, whether it is domestic or completely imported, the built -in maps of the car GPS products are nothing more than the resources of the only domestic map merchants in China. Come inconvenient. Generally speaking, the GPS navigator of regular brands will provide free updates for a year, or calculate it by the number of times, and support the free update service of about 2 times. After that, updating the map requires a certain fee. Generally speaking, the map update of the GPS map dealer is maintained at the level of half a year. There are also some manufacturers updated the data every three months, and the update fee is about 100 yuan. The way to upgrade is mainly to download through the Internet, which is relatively simple.

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