The Cleaning Card is a way to keep your card reader in good condition. Regular use of the cleaning card can help to prevent errors caused by dirt. It is designed to remove effectively dirt on card reader, hotel door, credit card machine, vending machine, and optical reader heads. Features -Color:White -Material:PVC -Size:12.50X8.00X0.10cm/4.91X3.14X0.04in -To use the cleaning card, simply take your product out and put the card reader, then turn it over and repeat the steps. -After application, please dispose of the cleaning card properly to avoid environmental damage. -The cleaning card can be repeated, ensuring your device stays clean and functional. -The Card Reader Cleaning Card is a good way to maintain the service life of magnetic heads and prevent errors caused by dirt. -Regular use of the cleaning card is recommended to keep your device in good condition. Package list: 5 x Cleaning Cards