I had tested several watches. In one it bothered that you always had to operate the trigger while running and later the sweat went directly to the display. The next time was after warm (15 min.) Is always the signal off, I gave back the clock. And at the last clock operation was so extremely complicated that I almost had a fit of rage :). So. Now at that clock, by Beurer: With 47 years as a legal professional runner I intended (finally) proper functionality and readability, and then another good operability. Beurer is with the PM 70 this primary wishes come true for 100%. The Signal LED is a first might initially be seen as unnecessary. The practice, however, shows that better than me, because you will be immediately informed if the training range is left. Who that is not enough, simply turn the beep it. Otherwise, the clock (almost) can fulfill every request, only one not: Good Times You have to run itself. I am extremely pleased and can only highly recommend this clock.