Contactless payment cards are ordinary cards with a chip and a pin code, with the addition of an antenna that provides a secure, contactless connection between your card and the reader. Typically, contactless credit and debit cards have a maximum range of about five centimeters, which means they need to be kept close enough to a reader terminal to receive its radio frequency. As soon as the signal is received by the antenna card, payment is made. Requiring close proximity also helps to avoid accidental and erroneous payments. Since we are talking about erroneous payments, we will discuss the main pros and cons of contactless cards. https://www.confiduss.com/en/info/blog/article/contactless-payment-cards/