The answer above led me to order the device (the original question, however, was already confusing, as there are no German 3-pin plugs). It is now going back, because:

The unit was delivered to me with a Schuko plug: Yes, two-pin, but with "thick" power contacts. Only later did I find the statement in the description that the product "*may* be equipped with a power adapter". If you click on a small inconspicuous "i" next to this statement, you are told that an adapter will be supplied in this case. Unfortunately, I did not find one. Either way, it would be nice if Galaxus would make it clearer in the product description that you will not be able to connect the device in Switzerland without an adapter. If you like adapters (ha!), you can still buy the device, but then the adapter should be included as promised.

it is a two-pole plug

Two-pole plug