The GS960 series are acoustic glass break detectors that emit an alarm when the glass breaks in intrusion attempts through windows, doors and glass walls. They use an advanced microcontroller technology that is programmed to take into account many relevant acoustic factors. Using the “Digital compensation of the room”, these detectors can distinguish between a true glass break and other irrelevant sounds. In parallel, the design of the detectors makes them suitable for wall or ceiling mounting, as long as they have a free “line of sight” for the window being protected. Certified model in Grade II. Three detection ranges: Zone 1: 4 to 9 m Zone 2: 2 to 4 m Zone 3: 1 to 2 m. Dimensions: 68x109x40mm.