What are the four button functions on the garage key?

The four buttons on the garage key function of various models may be different, the general remote control key keys are basically respectively: open the door locks, close the door locks, open the anti-theft alarm to enter the working state, disarm the alarm working state, some remote control five buttons, more than one trunk lock remote control open key. Usually the original remote key of the car is three buttons, respectively, open the door, lock the door, trunk. According to the car has the function, some long press the door open button in the open door at the same time, it will automatically open the window, long press the lock button can automatically close the whole car window, continuous press 2 lock button can be in the lock door at the same time to enable the anti-theft alarm device.