100pcs 13.56MHz Rewritable RFID Key Fobs for Access Control Systems

13.56 MHz Rewritable RFID Keyfobs 100 Pack. Secure, programmable keyfobs designed for access control, attendance, membership, and asset identification systems that use MIFARE Classic 1K technology. Ready for bulk deployment: 100 rewritable keyfobs included, ideal for offices, gyms, schools, and multiuser facilities. Programmable and reusable: Each fob supports writable 4-byte UID configuration for programming or reprogramming identifiers as system requirements change. Secure unique identifiers: Each tag contains a unique encrypted ID number for reliable identification. Works with existing systems: Compatible with MIFARE Classic 1K readers and controllers that support writable 4-byte UIDs. Compact and practical: Keyfob form factor fits on keyrings for convenient everyday use. Specifications: Frequency: 13.56 MHz UID format: 4-byte writable unique ID, encrypted Type: Rewritable smart keyfob for access control and identification applications Quantity: Pack of 100 identical fobs ready for programming Form: Keyfob design for easy carrying and attachment to keys or lanyards Primary use: Read and write operations for access control, time tracking, and membership systems using MIFARE Classic 1K compatibility Key features: Rewritability: Can be reprogrammed, allowing reuse for staff changes or system updates. Unique encrypted IDs: Each unit provides a distinct encrypted identifier to help maintain reliable user mapping. Bulk packaging: The 100-piece pack supports efficient provisioning for multiple users or replacements. Practical use scenarios: Office access control: Distribute programmable keyfobs to employees for door entry systems using MIFARE Classic 1K readers. Reassign fobs when roles change or fobs are lost. Gym or club membership: Issue fobs to members for facility access and check-in. Reprogram fobs for membership renewals. Time and attendance or library systems: Use fobs as individual identifiers for clocking in and out or checking out items. Centralized programming allows efficient ID management. What you get: One package containing 100 rewritable 13.56 MHz keyfobs with 4-byte writable UIDs and unique encrypted ID numbers. Compatible with systems that support MIFARE Classic 1K and writable 4-byte UID tags. Confirm reader and controller compatibility before deployment to ensure writable UID support. These keyfobs provide a practical, reusable identification solution for facilities requiring programmable RFID credentials in a convenient keyfob form factor.