The HONEYWELL-FG-1025Z is a glassbreak detector with time-of-arrival processing that incorporates false alarm immunity by distinguishing false alarms from breaking glass and only listens for sounds coming from the glass.The FG-1025Z performance is achieved through the use of 2 microphones and Time-Of-Arrival (TOA) processing and when a sound is generated in the room, the microphone nearest the sound will hear it first.