Need. A stored-value card is a kind of consumer card that stores a certain amount of money. Customers can deposit a certain amount of money into the card by recharging, and then use it when the merchant consumes. The card swiping machine is a device that reads the internal information of the stored-value card, which can quickly and accurately read the balance in the card and realize the consumption and payment of the amount in the card. Therefore, the use of stored-value cards in Lenten stores requires the use of a credit card reader for payment. When spending, insert the stored value card into the card swiping machine, and the card swiping machine will automatically read the balance in the card and display it on the cashier. Then deduct the money according to the consumption amount and update the balance to the card. At the same time, in order to ensure the safety and accuracy of consumption, it is recommended to carefully check whether the amount on the credit card machine is consistent with the consumption amount when using the stored value card to avoid mistakes or misoperation.