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What is the wifi pattern on the credit card for?

this pattern indicates that the credit card supports the function of Visa payWave. Can be used for wireless payment.

Visa payWave? It is a new function for Visa chip card. It uses the latest near field communication technology (NFC) in communication technology to support contactless payment at the sales terminal. It aims to make electronic payment enter the traditional retail industry which mainly deals with cash. For merchants in these industries, such as convenience stores, gas stations, buses, fast food restaurants and cinemas, speed and convenience are very important.