Upgrade from the plain white tags — this black ABS RFID keyfob works at 13.56MHz and is fully compatible with Mifare 1K S50 readers like the popular RC522 board.
The standout feature is the UID changeable chip: Sector 0 Block 0 (the manufacturer block) can be reprogrammed to any UID you need — useful for cloning, testing, or custom access control projects.
