The one click start device is a part of the smart car, which is a button device that realizes the simple start process and can also turn off the engine. This device can be modified in the position of the original car key lock, or can be modified independently on the panel. When using the one click start button, the car usually only needs to be lightly pressed to start or stop, saving the steps of finding and inserting the key. In most cases, the foot brake needs to be pressed during the ignition process.