Hey, I forgot...
Back in high school my a buddy installed 2 alarms.
The first was regular siren alarm with the bell, sensors and whistles...
The second was a silent pager alarm. This on is trigger the same time as the 1st alarm but installed in differnt. It has a 2 mile radius of communication whenever the alarm is actually set off.
However, we pissed him off on occasion because we would kick his tires and then watch him come running from the classroom to the parking lot. We timed him once with a stop watch and laughed after he got there.
Thanks for the memories..