GB-540

The GB-540 is a ZigBee acoustic glass-break detector that can be used with any ZigBee Home Automation 1.2 enabled home security panel. You can mount the detector on walls or ceilings to detect the breaking of framed glass on any exterior wall. The detector senses the sound of breaking plate, tempered, laminated, wired, coated, and sealed insulated glass. The detector is pre-calibrated, requires no adjustment during the installation, and supports the measurement of ambient room temperature.

The acoustic sensor of the GB-540 is omnidirectional and the range is measured from the sensor to the point on the glass farthest from the sensor.
You can mount the detector as close as 1.5 m (5 ft) from the glass.