Easy 4-Button Layout:
The ADT keyfob has four buttons on it. One is used for disarming the system (the unlock button), another for arming the system in the AWAY mode (the lock button on the top left), the STAY mode (graphic of person inside a home), and an optional button for police panic.
The panic button is not always programmed depending on your preference. The four buttons are all designed so that you need to push and hold them down for 3-5 seconds. It is designed this way to prevent accidental pushing the buttons while keys are in your pocket or purse.