Shot timer

The time is usually recorded to hundredths of a second (centisecond), which is required by competitions in the International Practical Shooting Confederation.

Soon after Ron Bailey of Competition Electronics built a timer with an included microphone that was able to mark the time of each shot fired.

[4] Before that, Double Alpha Academy had launched the shot-timer watch ShotMaxx in 2013 after two years of development, which took advantage of data fusion using a built-in microphone and accelerometer to detect shots.

[5] These types of shot timers can be particularly suitable for indoor ranges where there are a lot of gun sound reflections, or on quieter firearms[6] such as small caliber rifles.

However, many shooters use a mobile app-based shot timer only for its par function when conducting dry fire practice in which there is no need to pick up the sound of gunfire.

Before the introduction of shot timers, the referee had to manually stop a stopwatch when the shooter was finished.
Some shot timers can be linked to big board displays to provide instant feedback to the audience.
Shot timers provide additional features to serve needs of specific applications.
The look of one of modern shot timers.