Our Mifare Classic 1K NXP EV1 3-UP cards are top-of-the-line contactless cards equipped with an NXP EV1 chip that has a 1K byte memory. They possess a 4-byte NUID and operate at a 13.56 MHz frequency range. These cards are pre-scored into three equal parts that can be easily snapped into key tags, making them perfect for use in large volume events. We recommend checking the compatibility of these cards with your printer beforehand. If you're unsure, feel free to contact our team via our live chat function.Product details:Sold in packs of 1001/3 of a CR80 credit card size (86mm x 54mm)Fully ISO/IEC 14443 Type A 1-3 compliant