The product is used for emergency engine starting when the car battery is out of power (connect the battery of other vehicles to the starting motor line of the vehicle without power), and can also be used as the charging line or power line of the battery.First clip the red chuck in the positive terminal of the non-electric vehicle, and then connect the positive terminal of the electric vehicle.The black connector is first connected to the negative pole of the electric vehicle, and then to the engine hook or negative pole of the non-electric vehicle.Start the electric vehicle to run for a few minutes, then start the non-electric vehicle to run for a few minutes. If you can not start, you can put the electric vehicle throttle slightly higher, and then start the vehicle without electricity. Remove the emergency line of the jumper according to the reverse order of the jumper.The black negative chuck should not be directly clamped on the negative electrode of the battery of the non-electric vehicle as far as possible, and should not be connected or close to the parts that the engine will move or transfer when it is running.When connecting the rescue car wire, the lights, heating and cooling gas, audio and other switches and computer equipment of the vehicle without electric power must be turned off.Check whether the battery voltage is the same. If the battery is frozen, it is forbidden to start. It may explode.