What is the use of NFC card set

NFC, short range data exchange, mainly used for mobile payment services.  At present, alipay Wallet is the most widely used. As long as users stick their bank card (or bus card) on the back of the phone, Alipay Wallet can read the information of the bank card (or bus card), and complete the operation of consumption and transfer.  

The biggest risk of NFC is that the card does not need to touch the phone under the conditions of software and hardware. As long as the distance is small enough, the phone can read the information in the card and conduct payment operations.  As a result, in buses, subways, shopping malls and other public places, just a moment of passing, the cards in the belt or even in the wallet may be swiped by criminals, users will not only leak privacy information, but also lose a lot of money.  

NFC label bar experts said that THE NFC security card sleeve is designed according to the principle of Faraday cage, using special metal ingredients as raw materials.  It is like an "insulating device", as long as the card is placed in the card jacket, no NFC device can read the card information, let alone recharge, transfer, payment and other operations.