As my old heart rate monitor has given up the ghost, I was now looking for a new one. My old clock had a lot of features that I never needed and who usually only hindered me in the operation of the clock. Therefore, this time I wanted to have a simple clock that does nothing more than display the pulse. This makes this clock very well. There is only one button on it and the only extra feature is a stopwatch. Moreover, it is also more reliable than my old clock. Even through a thick fleece sweater and a winter jacket it reliably indicates the pulse. My old clock had here most annoying dropouts. A bit of a pity, I find that you do not, the clock can display the time when it is in pulse mode. But I can live with and that's not worth a star deduction. Therefore full rating and recommendation from me.