Gps speed limiter.Key points for purchasing GPS navigators

　　1. Check the screen effect and workmanship of the car navigation system. Observe whether the screen display is clear, whether the operation response is sensitive, whether the accuracy is good, whether it is a capacitive screen or a resistive screen. Cheap products usually use resistive screens, which have a slower reaction speed than capacitive screens. Check if the seams between the screen and the body are tightly connected, and even large gaps are not good products. Check from the side to see if there is any light leakage on the screen after turning on.

　　2. Choose a navigation product with a built-in map and a China Navigation Electronic Map Qualification Certificate. Many manufacturers now do not have the "China Navigation Electronic Map Qualification Certificate" and are also providing map navigation, resulting in many navigation errors.

　　3. Check if the hardware chips of the car navigation system are the latest. Be careful when selling outdated car navigation products, and it is best to inquire before purchasing. The latest ones are SIRF fourth generation chips and independent chips, such as Garmin.

　　4. Finally, identify anti-counterfeiting labels. Free upgraded genuine maps usually have anti-counterfeiting labels on the product body. Car owners can check the phone number, website, and other information on the label when purchasing a car navigation device.

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