The Glass Break Sensor is specially designed to protect windows. Triggered by the pitch and frequency of breaking glass, they are effective within 25′ of the windows. Typically mounted on the opposite wall or above windows on the ceiling. Glass Break Sensors add an extra level of perimeter defense to your door and window sensors. Features pattern-recognition technology for superior detection and false alarm immunity. This way, anytime glass breaks, you’ll be the first to know. The sound of breaking glass is never a welcome one, even more so when it comes with the threat of someone entering your home…lets stop them in their tracks with the added security of a Glass Break Sensor.