- Material and standard: New PVC card with waterproof and durable features that comply with ISO14443A. - Chip and data protection: Uses a 1K MF IC chip at 13.56 MHz; read-only and cannot be rewritten. - UID and security: All cards are pre-programmed with a unique 4-byte UID that cannot be changed. By default, FF. - Packaging: Each card is individually wrapped in white with no markings on either side. - Size and thickness: Credit card size 85.5 x 54 mm; thickness 0.88 mm. - Quantity: 100 pieces. - Compatibility and performance: Compatible with ISO 14443A readers operating at 13.56 MHz; designed for reliable proximity card applications. - Use scenarios: - Access control for offices or secured facilities requiring ISO 14443A proximity cards. - Employee ID, membership card, or event pass where a non-rewritable, unique identifier is desirable. - Transit, loyalty, or attendance programs that rely on a fixed UID for identity verification.