1. Whether it supports power disconnection alarm

　　One of the fundamental functions of a GPS positioner is to see if it supports power -off alarm. The power -off alarm is to prevent the battery from power in the car when the car is stealing. It is useless, so the power failure alarm is one of the functions that the GPS positioner needs.

　　2. Whether there is a built -in battery

　　The GPS positioner without built -in batteries is easy to stop working. In addition to the power -off alarm, the GPS positioner also has built -in batteries to prevent vehicle batteries from running normally without electricity. Many low -end GPS positioners do not have this function in this regard. Many people do not pay attention to this function when buying the GPS positioner. Although this function is not very important, it can guarantee that when the vehicle battery has no electricity equipment, normal operation.

　　3. Whether to support vibration alarm

　　There will always be abnormal vibrations before the vehicle is stolen. It is the best defense before being stolen in front of the vehicle. You can send text messages to remind the owner when the vehicle has abnormal vibration. Prevention of stolen situation.

　　4. Whether to support width voltage installation

　　Any device requires voltage, so a good GPS positioner needs to run in a certain reasonable voltage environment. Excessive or high voltage will cause abnormal operation to eventually cause destruction to the device. Now the better equipment on the market is generally generally on the market Both support 9 ~ 33V voltage.

　　5. Is the positioning accurate

　　Usually when we use GPS locors in large cities or places in large cities or terrain, using low -end chips in these places is its biggest weakness. Secondly, the signal is seriously lost, and the signal is often not received, which is useless to install it. The positioner feels indifferent in normal times, but if it is in an emergency, it can indeed play a great role. Therefore, when buying, you must not only consider the price and official publicity, but also see what kind of chip the GPS positioner is used. The chip is the central hub of a GPS positioner.

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