1. Close the car window/s automatically after lock the car --- After park the car and lock the car with remote, it closes the window/s (Max. 4 windows) automatically and simultaneously * 2. Remote close car window/s ---- You can use remote to close window/s. Push unlock-lock-unlock buttons of remote, it rolls down the window/s, then push the "lock" button once, it rises and closes them. * After park your car, take out the remote, close the door and push the "lock" button. If you forget closing the windows, the window closer rises and closes them automatically. * In hot Summer day, inside the car, it is full of hot air after the car is parked for some time, Simply push the "unlock" buttons three times, all the four windows open to dissipate the heat, no need to open the door, no need to endure the extremely hot air inside car.