Must have it, see the following. But the product is completely overpriced.

- - - - - - - - - - - - - - - - -

Digitec (or any other Swiss dealer) is obliged to supply electrical appliances with a Swiss plug. If the appliance comes with a foreign plug, a suitable replacement cable should be supplied if the mains cable is pluggable or alternatively if the mains cable is permanently connected, a suitable adapter should be supplied.

If the appliance is delivered without a suitable plug, complain to the customer service and insist on a cable or an adapter, free of charge.

Info Digitec --> https://helpcenter.digitec.ch/hc...
Point 1 --> https://www.esti.admin.ch/de...

- - - - - - - - - - - - - - - - -

The offer for Fr 300.- does not come from Digitec itself but from the third party supplier Long Island GmbH CH.
https://helpcenter.digitec.ch/hc...
This third party generally attracts negative attention with its pricing on the Digitec/Galaxus sales platform.
worth reading --> https://www.digitec.ch/de...
The supplier buys cheaply from Amazon and then sends the product on to the customer.
https://www.amazon.de/Stillstern...
It's ok for Digitec, you don't have to buy it and they earn money from sales.