Which debit card reader do I need?

This is how it works:
You go to OptiOffice (Office-> menu item cash register -> Sell item <-).

Then you add your products/services and select "EC card" as the payment method.

Then you go to any EC device to carry out the debit process there (enter the amount, confirm, sign, etc.).
This happens completely independently of OptiOffice. After the debit process, go back to OptiOffice and click -> "Conclude sale" -> Then click on "Print receipt".

Keywords: EC reader, chip cards, EC connection, EC device, use a card reader, EC payment, payment with EC card, EC card