Key features and benefits - High performance rewritable UID key ring: supports reading, writing and reprogramming with over 100,000 rewrite cycles. Can clone 13.56 MHz IC cards and NFC stickers, but is not compatible with 125 kHz key cards. - Excellent compatibility with MIFARE Classic 1K: 4-byte UID, 1024 bytes of memory, 16 sectors of 4 blocks each, compliant with ISO/IEC 14443A. - Unique encrypted ID and reprogrammable data: each RFID card has a unique encrypted ID number and its data can be reprogrammed to suit your needs. - Wide application: works with various 13.56 MHz RFID readers and access control system devices. Practical use scenarios - Employee access provisioning and backup: clone authorized credentials for new readers or temporary staff, while preserving original card IDs. - System testing and maintenance: duplicate cards to test access permissions, verify reader responses, and update access levels as needed. - Personal credential management: carry a single rewritable credential for office, gym, or dorm access and update permissions as roles change.