First of all: the clock was delivered after about 2 weeks - directly from China with Chinese sender.
And it is unfortunately occurred exactly what I feared most: The bracelet clock stinks extremely, from which I conclude that wearing the clock would not particularly healthy. As a first step I have put it out, but after 1 week it stank unfortunately still. Even after a total of one month on the air, the smell did not even put a bit.
I have the clock then - in the hope I can bear at some point - several times washed with soap (the water was then slightly brown ...) and even scrubbed with an industrial detergent - brought nothing. I had the bracelet then unfortunately but throw away.
It is positive that the clock itself, which I got from the band before discarding, does not smell and still works. You could attach to another similar bracelet easily again.