I just got home and realized that the clock be detached from the wall and the shards of glass front are distributed throughout the bath. Generally, it is a mystery to me how one can use glass here if such a design anyway tends to fall off. Plastic would be much thoughtful.
The clock thus held approximately 2-3 weeks on the wall, looking also nice.
However, I can only advise everyone to be 2x consider whether this clock you want to hang the bathroom and want to experience a similar surprise. I regret any case the purchase.
