I require help possibly from a GERMAN: What on earth is this "menstrual anti-cramp mini-pad with intensity levels" thing?

Mesonfielde
www.bit-electronics.de/...zen-EM10_detail_694.html

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So I went to the store today and found this really weird "mini pad" thing for menstrual cramps or whatever, but apart from having 15 intensity levels, I have ZERO clue what this thing does, how it it used, or exactly what it is.

If anyone knows what this is and how it works and what it does, I'm all ears and curious, thank you.
I require help possibly from a GERMAN: What on earth is this "menstrual anti-cramp mini-pad with intensity levels" thing?
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