Question about Oral-B iO-Series 9N

I had/have a two-pin plug with the charging station. The toothbrush itself is only placed on the charging station for charging and therefore works perfectly in Switzerland.

Yes , includes a power adapter

Normally, "May be equipped with a power adapter: Yes" means that this device comes with a foreign power plug and therefore an adapter is necessary (which should be included) to be able to plug the device into our sockets.
But I can't imagine that for an electric toothbrush. I would rather have expected the device with a 2-pin Euro plug that can be plugged into Swiss sockets without any problems. As you can see here. https://futurezone.at/produkte...