What are the 4 circles at the top of the terminal screen?

In accordance with the EMV Contactless Specifications, these circles indicate the state of contactless transactions:

  • First circle from the left blinking: The contactless reader is idle.
  • First circle constantly 'on': The terminal has received the payment request and the contactless reader is ready to read a card.
  • All four circles 'on': The contactless reader has read the card. A beep will sound, to indicate the card can be removed.
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