The Siren + Keypad gives off a loud alarm when your system gets tripped. In order for it to alarm, it has to be armed first. Arming it via the Siren + Keypad is just a few keys away.
Step 1. Press Arm or Arm-doors and windows
*For arming the entire system:
*For Doors and windows arming:
Step 2. Wait for the 3minutes to be finished until you hear "System armed".