Stay safe from intruders by installing broken window detection. The Recessed ShatterPro is an advanced version of the ShatterPro acoustic glassbreak sensor. By processing over 30 frequency points across the glass break frequency spectrum, the Recessed ShatterPro can eliminate most common false alarm sounds, while providing excellent glassbreak detection. Using Interlogix 's patented Pattern Recognition Technology, the sensor listens for the actual pattern of breaking glass while eliminating most false alarm patterns. Recessed ShatterPro sensors listen across the glassbreak frequency spectrum to differentiate the sound of breaking glass from most normal room sounds. The test feature makes installation faster by eliminating the test mode jumper. Testing is done by activating the hand-held glassbreak tester at close range. Opening the sensor is unnecessary. A simple hand-clap feature lets end-users confirm at any time that the Recessed ShatterPro is operational. The sensor will blink twice. The ShatterPro is designed for use discreet sensor installations. The recessed model can be mounted directly into the wall or ceiling or can be used with the single gang box accessory. A trim ring is included.