This sporty chronograph from the Citizen Company is equipped with many details. The time of 30 heartbeats can be measured with the stopwatch function. The watch also has a telemeter scale, with which the time between acoustic and visual perception can be measured. The watch has a dark-running reserve of 150 days thanks to the non-polluting eco-drive, which can convert both artificial and natural light into energy. www.citizenwatch.com