The vehicle's own tools, including fire extinguishers, tripods, and tire changers, are basic, but the most easily overlooked. Also, the status of the spare tire should not be assumed to be usable because it has not been used for a long time. Such tools should be checked periodically to see if their functions are available, so as to avoid confusion when needed. For example, drag hooks, trailer ropes, etc. that may be used on special roads (cross-country, sand, etc.), depending on the vehicle environment. In addition, the vehicle's tools may include a car recorder, mobile phone stand, vacuum cleaner, air purifier and so on. Finally, there are rescue wires and on-board air pumps, which are mainly equipped according to vehicle usage scenarios and habits.