1.PA-456 glass crush detector can Distinguish the special voice from perimeter when the glass fracture ,It receives the microphone to of the process figures of the audio frequency signal filter and analytical(seven frequency filter, bump shot and vibration wave form analysis), and compare a memory database,  then decide thus whether alert signal 

2.The monitor scope of locator is one whole room.(with window how much irrelevant)In the meantime its  intelligent degree be in a row adjustable, assurance can set a best work to order according to the environment circumstance-defend misinformation but don't reduce an intelligent degree.

Model number               PA－456
digital processor           12/8 bits 8MHz
sensitivity  degree :       Continuous adjustable
Detection range:           High sensitivity: 9m, low sensitivity: 5m Operating temperature:   -20℃～+50℃
 power supply input   :    9－16Vdc,17mA
Install position  :            ceiling or wall, near orface to window
Anti- interference :        Wireless and electromagnetic wave
size:                              Any size all of the glass
The alert indicate :         red LED indication for 3second
LED indicate :               green LED ON Indication,red is alarm
alert output:                   off offen 28dc,0.15A
anti-tamper SWITCH:   0.15A，28Vdc N/C, opens when cover                             removed, 0.15A, 28Vdc
Working  humidity :        95%  RH 
 Weight  :                      100g
size:                              90x66x25mm (l*w*h)