The 5812-RND detects in a full 360 coverage pattern, with a maximum 25 (7.5m) radius from sensor to glass. Using the patented Pattern Recognition Technology™, the sensor listens for actual patterns of breaking glass while eliminating most false alarm patterns. The 5812-RND listens across the glassbreak frequency spectrum for greater false alarm immunity. In independent lab tests, the 5812-RND technology provides 25% better false alarm immunity than industry leading glassbreak sensors. The 5812-RND can be tested without opening the sensor by activating a hand held glassbreak tester at close range. A simple hand clap feature lets end users confirm at any time that the 5812-RND is powered up.