Our Genuine MIFARE Classic 1k Cards With Magnetic Stripe are fully compliant with ISO/IEC 14443 Type A 1-3 standards, ensuring superior security and privacy protection. Each card is equipped with a genuine NXP EV1 chip, providing 1K byte of read/write memory and a 4-byte NUID. The cards also feature a high coercivity magnetic stripe and operate at a frequency range of 13.56 MHz. As a registered MIFARE partner, you can trust in the quality of our products.Genuine NXP EV1 chip with 1K byte of read/write memory4-byte NUID for data privacy and securityHigh coercivity magnetic stripe and operates at 13.56 MHz frequency range