"Our Mifare Classic 1K NXP EV1 3-UP cards are high-quality contactless cards. Embedded with an NXP EV1 chip with a 1K byte of memory, these cards also have a 4-byte NUID and operate at a 13.56 MHz frequency range. As the cards are pre-scored into three equal parts of easy to snap key tags, it makes them ideal for events with a large volume of users. We advise you to check the compatibility of these cards with your printer. If you’re unsure then we’d be happy to check for you. Use our live chat function to speak to a member of our team.