The ACE i3 bite alarm is the result of two years of research, development and testing. Incorporating technology never seen before in bite alarms. Gone are the days of fragile glass reed switches. With the ability to detect line speed, line vibration and line direction from a single robust sensor, tachogenerator technology together with high speed digital signal processing is now the state of the art with a Patent granted. One test sensor has spent over a year, completely exposed to the elements and one has spent six months in a freezer at minus 19 degrees Celsius - both still work perfectly and will continue to be monitored. An advanced radio system is employed with sophsticated protocols to ensure that no matter what the situation you don't miss that indication.