The Flexguard Dual Technology Sound Sensor features additional false-alarm prevention measures that must feel the shock and hear the specific frequencies of breaking glass before it will sound off an alarm.
Will pick up any glass breakage in an area up to 25' in any direction
Contains a flex and audio microphone
Easily adjustable sensitivity
Dimensions: 5.5" x 2.5"
Batteries: Two 3.5 VDC AA lithium batteries or one 9 VDC alkaline or lithium battery