But I have to agree with the review by Berthold: not very loud!
Those who come to bed early enough or easily wakes so has rather no problem. But who needs to be geballert the alarm clock out of bed times (always or) can easily sleep through this alarm clock.
There are also alarm clock since the alarm in the course is getting louder and end up really loud. I would have like this also desired in a brown-quality product - then I would have awarded 5 stars.