MIFARE Classic 1K Keyfobs, ISO14443A 13.56MHZ RFID IC Key Fob RFID Tag M1 Access Control Key Card for Entry Access Control System (50pcs,Black)

• High Quality: Made of ABS waterproof material, Waterproof & Durable, high-quality Copper Coil inside. Each keyfob has metal keyring, easy to carry
• Compatibility: Compatible with MIFARE Classic 1K Card (M1 Card). If your lock uses M1 card, these key fobs work for your lock too
• Chip Type: Compatible with 1K, FU-DAN chip FM11RF08S. 1024 bytes memory. Protocol: ISO14443A. Factory default key: FF FF FF FF FF FF
• Reading Distance: 0-60 mm/0-2.36 inch (Depends on the RFIC R/W Device and environments). Read only, cannot be copied, erased, or altered
• Widely Used: Suitable for 13.56MHz RFID proximity access control system and ID management system. For example, register them to your RFID door lock as new keys if applicable

This card requires system authorization before use. Simply enter the card number into the access control system. The card cannot be cloned. The chip number is fixed and cannot be erased or altered. Since it is not a UID card, the sector cannot be modified. The authorization card sector already has a card number that cannot be altered. Simply writing this card number into the system allows the card to be used and authorized repeatedly. Specification: Material: ABS Chip Type: Compatible with 1K, FU-DAN chip FM11RF08S Frequency: 13.56MHz Memory Capacity: 1Kbit Factory Default Key: FFFFFFFFFFFF Protocol: ISO14443A Compatible with MIFARE Classic 1K Card (M1 Card). If you lock uses M1 card these key fobs work for your lock too Reading Distance: 0~60 mm/0-2.36 inch (Depends on the RFIC R/W Device and environments) Writable: 100000 times Size: 30 x 40 mm Note: UID can't change, uid is not rewritable.