The ERB-8IN-M12 Easy Reset Button is for use with the Digital output models of our MAG series flow meters. The total on these meters can be reset using the local display interface, however there is a multi-step process involved. Using this button makes it as easy as a single button press. This option used output 2 as an external reset, so output 2 can no longer send a signal, it becomes an input. If this option is ordered with the meter, the meter will come pre-programmed by the factory.