1. Please pay attention to waterproof moisture and moisture;

　　2. Please pay attention to waterproof moisture and moisture;

　　3. The power supply of the device is between DC 8V — 36V. The recommended working voltage is 12V or 24V. Users should first determine whether the user's power system is within this range. Excellent terminal large voltage will damage the terminal;

　　4. When the ambient temperature exceeds the terminal operating temperature range (-20-+60 ° C), it is recommended to disconnect power to prevent death;

　　5. When installation, the external GPS antenna must ensure that the front (black surface) level (black surface) is facing the sky, and there is no metal obstruction above the antenna and the guarantee of the antenna installation is firm;

　　6. When the vehicle is in an underground parking lot, tunnel or garage, it will affect the positioning signal, and the blind area of the communication network signal may cause the device to be unavoidable; when the vehicle is driving out of the area, the equipment will automatically return to normal work;

　　7. In the case of abnormal phenomena, please do not repair it yourself. Please contact the after -sales maintenance service personnel in time;

　　8. Please be completely shut down when replacing the SIM card.

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