helpful but overpriced

- Runs with batteries, battery not included, to open the battery compartment with the aid of a cross key, after inserting the battery, the clock runs continuously and consumes Battieriestrom, even if it is set to zero (to hear the quiet ticking); So it does not exhibit itself! - Much better would be a switch that blocks the battery consumption increases with zeroing as a flashlight. Or have a mechanical wind-up as many kitchen timer.