How can I pay for the tickets with my postfinance card?

I cant introduce my card to pay the tickets. Do I have to have something for it? Its saying something card reader.. How can I get it?

Thank you for your query.

With the Postfinance card you can only pay with the yellow card device that corresponds to it. You can get this card device at a post office.

Kind regards,
FatimaH

FatimaH Thank you, it helped a lot