EMAG-A. The ERA Door & Window Magnetic Sensor is an ideal product for the protection of doors and windows, particularly in entry and exit routes. It functions as a compatible accessory with any ERA Alarm Kit and is tamper-protected. A two way Door/Window Sensor that can be installed on doors, windows and any other objects that open and close, the sensor transmits signals to the control panel when a magnet mounted near the sensor is moved away. It will also transmit an alert signal to the control panel in case of a low battery. The tamper protection ensures that sabotage attempts to move the contact will result in alarm activation. The kit includes a white door / window magnetic sensor, double-sided tape for fixing in place, battery, and installation & operating instructions. Ideal for Entry and Exit Routes. Easy to install. Tamper Protection. Batteries and Fixings Included