The electrics on the car define different power-on states according to the use requirements, which are generally divided according to the ignition switch gear (OFF, ACC, ON, START). still exists. For example, when your key is not in the ON position, the window cannot be adjusted, which is a functional limitation; but if you turn off the key, as long as you don’t pull it out, the music can still be played. This is a humanized setting; the moment you start, The window lift will stop for a while, and if the wiper is scraping, it will also stop for a while, which is to save battery power for the starter.