I have misused the clock as a laboratory stopwatch. She is very well suited for it. The batteries are included. They beep when pressed, but now is not unpleasantly loud, as other stopwatches do that sometimes. The set-up function works well, even if I have something needed (2-3min) to get to the rotation. You have to pay to open the clip and set the clock upside down, so that the metal hook (under the clip) works itself down. The keys are very smooth and you should therefore not carry around the clock in a tight pants with him. However, you can clip it on his coat very easily.
