Stopwatch is a timekeeping device used to measure the amount of time elapsed from a particular time when activated. It is typically used to measure event durations, such as a lap time in a race or the split time of a runner in a race. Stopwatches are often accurate to within a hundredth of a second and can be used for a variety of purposes, from sports timing to industrial testing. They usually feature a digital display, a start/stop button, a reset button, and an adjustable timer. Stopwatches are also known as chronographs or split-timers.
