MIFARE Classic EV1 RFID cards are widely used for various applications due to their secure and efficient contactless technology. Available in 1K byte and 4K byte memory capacity versions, MIFARE Classic EV1 RFID cards are suitable for different data storage needs. Operating at 13.56 MHz, complying with ISO/IEC 14443 Type A standards, the cards are compatible with various readers. Optional with 4byte non unique identifier and 7byte unique identifier for secure identification, access control, and cashless payment.