A bank savings card or credit card with four arcs.
B. K bank or credit card with "fast flash payment" sign.
2. After the bank card is recognized, it is also necessary to ensure that the pos machine has the function of flash payment, and the pos machine with four arcs on the side supports the card waving operation;
3. Open the pos machine, click the consumption input amount, and click Enter;
4.pos will prompt three operations: card insertion, card swiping and card waving;
5. Brush a bank card or credit card with card swiping function on the side marked with four arcs on the pos machine.
6. If you swipe your card successfully, you can spend it successfully by entering the password (I set a small password, so I didn't enter the password).