Since there is not much to say. That part is good for nothing. The edges of the cheap plastic mouse are so sharp that you can cut it. It also does not work simply. Scrap, which you can not even give back, because you still have to pay themselves for the shipping cost (to Hong Kong). So dustbin 12 for nothing ...
Addendum: The seller has today contacted me via email and offered me to refund the purchase price and pay the shipping costs. This is very generous and I can only praise the store for it. The mouse is, however, already disposed of ...