Smart card contactless (contactless smart card), the card has a chip and a coil antenna inside, which can be viewed with the naked eye can not see, can communicate with the card reader, the uplink radio range. This could be set at close distance (proximity card) or a similar distance (vicinity card) standard, depending on the card. Without the need to make full contact with the reader. Most are used to express card bill. Metro Tickets BTS and MRT. And payment cards, such as the Smart Purse card and so on.
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