100-Black M-I-F-A-R-E Classic 1K Keychain RFID IC S50 Key Fob ISO14443A 13.56MHZ NFC Tags F08 Token Key for Electronic Smart Door Lock

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• 1. High Capacity 1K Storage & Classic RF Technology 100 pieces per pack Equipped with Mifare Classic 1K chip, it has a storage capacity of 1024 bytes, supports ISO 14443A standard, operates at 13.56MHz high - frequency communication, has a read - write distance of 0.5 - 10cm, and is compatible with mainstream RFID devices such as access control systems, time - attendance machines, and campus one - card - through systems. It ensures stable and fast data transmission.
• 2. Durable Black Keychain Design Made of ABS+PC wear - resistant material, the black matte surface is scratch - resistant and drop - resistant. The key - ring - style portable structure can be directly hung on keychains, backpacks, or name tags. It is small and lightweight (with dimensions of approximately 40*30*3mm), takes up little space for daily carrying, and is suitable for business or commuting scenarios.
• 3. Wide Application Compatibility Compatible with NFC mobile phones (requiring Mifare read - write function support) and traditional RFID card readers. It can be used for tasks like copying access control cards (confirmation of unencrypted original cards required), small - amount payments in e - wallets, and as library borrowing cards. It meets the needs of multiple scenarios such as property management, enterprises, campuses, and public transportation.
• 4. Secure Encryption for Data Protection Supports the Mifare Classic standard encryption algorithm. With 16 independent sectors that can be encrypted separately, it prevents data tampering or leakage. It is suitable for time - attendance and access control scenarios that require privacy protection, providing a basic guarantee for personal and corporate data security.
• 5. Ready - to - Use & Considerate After - sales Service The chip is initialized at the factory, so it can be used directly without complex settings. The package includes 1 black keychain RFID card + user guide. If there are compatibility issues, customers can contact the customer service for technical support. A 30 - day no - reason return and exchange service and a 1 - year warranty are provided.