100PCS 13.56MHz RFID UID Changeable Keyfobs Mif 1k S50 Block 0 Sector Writable RFID IC Keychains Tags CUID Clone Access Control

Product Feature 1. Waterproof RFID key tags proximity door control access. 2. Each key fobs has a metal keyring. 3. Widely used at apartment, office, park and other places. 4. Brand new and high quality ABS material. 5. Support Read, Copy, Write. Product Description 1. Material: ABS material 2. Color: Blue / Red / Black / Green / Yellow / Gray / White / Purple optional. 3. Support: Read, copy, and write. 4. Working Frequency: 13.56MHz 5. Chipe: UID chip 6. Waterproof. 7. Standard: ISO14443A 8. Package included: 100pcs keyfobs UID works the same as the normal IC cards, for Mif 1K S50 standard. Only the Sector 0 Block Zero which is known as the Serial Number / Manufacturers Block (Chip UID) could be programmed to any UID you want. Note: Android MCT won't work with UID 1, UID card block 0 (UID's block) can be modified arbitrarily. 2, block 0 directly with normal mif read-write device modification.