It doesn't work. I bought a new battery so I could get the data out of this trash, but to no avail. apparently the previous battery made a short circuit, which sputtered the resistors. It's too complex for me to find fault ....
if you have this trash, change it urgently because I relied on "quality". Which does not exist.
I prepared a letter to send to schools to at least protect children in Austria from buying this bomb. I have all pictures, since the beginning of the problem.