The ZD2112-5 Door and Window sensor is used in any Z-Wave network to detect the opening or closing of a door or window. Special Design can fit most of door/window frame. The primary sensing element is a magnetic reed switch, the ZD2112-5 is supplied with the sensor, sensor mounting bracket and the trigger magnet. An additional set of sensor inputs are provided through a 2 position screw terminal and can be used to expand the sensor capability to multiple inputs. The ZD2112-5 is powered by 2 x AAA Battery (supplied with unit, battery life is more than 2 years) and is intended for indoor use only. The ZD2102-5 features tamper proof switch, low battery warning and can be firmware updated over the air.