At the beginning of Rudnlauf worked nich - I had to unscrew it and find that a gear has not resorted.
After that, the timer worked like it should.
Info on all potential buyers:
The unit makes loud (in my opinion) sounds - for us it is about 2 meters from the bed and I hear it loud and clear. Let's see if I am getting used to it like a clock or not ... the more expensive devices (especially digital) should not have this "problem".