Unique analysis model in recognition of the frequencies and acoustic sequences characteristic of fracture of framed crystals providing superior detection, combined with excellent immunity to false alarms. These units are easy to install and do not require adjustments, detecting the breakage of all types and thicknesses of standard glass, ignoring any unframed glass breakage and other possible sources of false alarms. Great installation flexibility: wall / ceiling or recessed mounting. Power 9.3 - 16 VDC, 20mA at 12 VDC. Dimensions: 87 x 50.7 x 28.6 mm.