Sensing element: Electret microphone |Break detection distance: Up to 9m |Microphone coverage angle: 180 degress |Up to 1000m in an open space (in a perfect environment) |Operating frequencies: 868.0 – 868.6 MHz |Battery: CR123A battery, 3V |Battery life: up to 7 years |Dimensions: Diameter – 20mm, Height – 90mm
