13.56 MHz contactless access card compatible with 13.56 MHz IC door access control systems. Designed for reliable read, write, and copying operations with long rewrite endurance. Key benefits Ready compatibility for access control installations: works with all 13.56 MHz IC door access control systems and 13.56 MHz card readers, minimizing integration effort. Secure card layout and standards compliance: fully compatible with MIFARE Classic 1K format and compliant with ISO/IEC 14443A protocol for predictable system behavior. Durable and reusable: supports over 100,000 rewrite cycles, reducing replacement frequency and lowering operating interruptions. Practical read range: reliable reading distance of 0 to 5 cm 0 to 2 inch for typical door readers and proximity terminals. Clear limitation to avoid misuse: not compatible with 125 KHz devices. Technical features Operating frequency: 13.56 MHz. Card type compatibility: MIFARE Classic 1K, 4byte UID. Memory: 1 Kbyte organized into 16 sectors of 4 blocks each. Sector flexibility: Block 0 sector changeable. Protocol: ISO/IEC 14443A compliant. Lifecycle: supports read, write, and copy operations with more than 100,000 rewrite cycles. Reading distance: 0 to 5 cm 0 to 2 inch. Incompatibility: cannot be used on 125 KHz devices. Typical applications Access control for offices and residential buildings: issue cards to staff and residents for door entry systems that use 13.56 MHz readers. Time and attendance terminals: integrate with employee clocking systems that support MIFARE Classic 1K for tracking work hours. Membership and loyalty programs: use as reusable ID or membership cards where secure, rewritable storage and shortrange reading are required. What makes it stand out Proven MIFARE Classic 1K compatibility and ISO/IEC 14443A compliance for broad reader support. rewrite endurance for frequent updates and long service life. Straightforward integration with existing 13.56 MHz access control and reader infrastructure. Compatibility note Compatible with 13.56 MHz card readers and 13.56 MHz door access control systems that support MIFARE Classic 1K. Not usable with 125 KHz devices.