Very nice timer for working in a laboratory

Among the features in general I agree with the previous speakers.

The only drawback is this I see:

- There is no button / switch to the timer off and there is no "lock-button" to lure the keys.

In the lab, I'm wearing the alarm mostly in the coat pocket and if you somewhere comes off accidentally, it may happen that the timer stops, which is very annoying.

Furthermore, you can not turn it off when you take with him in his pocket or the like home, so it can happen that he suddenly starts.