what is that security system calls?

[jerryyu]

I had been online searching endlessly for the name of the security system that almost every stores used, and that is sending signals to the police station telling them that an intruder has came in through Acoustic Sensors(e.g. breaking of a window).

[Cap'n Refsmmat]

http://en.wikipedia.org/wiki/Alarm_system

 

There's a variety of companies that install them.