Mifare S50 13.56MHz RFID CUID Writable Chip Keyfob

Mifare S50 13.56MHz RFID Keyfob with Programmable UID

Mifare S50 13.56MHz RFID programmable chip/keyfob with a keychain. The chip is made of PVC with a high-quality surface for printing, making it suitable for access control to doors.

What is a CUID keyfob? The UID of standard MIFARE 1K cards comprises the first 4 bytes in block 0 of sector 0 and cannot be altered post-manufacturing. CUID is a second-generation replaceable UID card, where block 0 of sector 0 can be modified like other blocks. It can be modified using mobile applications such as NFC from MCT, MTools, or RFID Tools.

Specifications:

• RFID chip: Mifare S50/Mifare1S50/MifareS50/MF1S50YYX_V1/M1/1k
• Frequency: 13.56MHz
• Programmable: YES - CUID
• Format: ISO14443
• Capacity: 1Kb
• Dimensions: 28x35.3x4mm (1.1x1.4x0.16 in)
• Material: ABS
• Color: Blue
• Operating temperature: -20 °C to 70 °C (-4 °F to 158 °F)
• Reading distance: 1-4 cm (depends on RFID reader)

Areas of application: Community security, access control to residences, parking cards, employee attendance cards, etc.

MIFARE Classic block0, MIFARE Classic Gen1A aka UID, MIFARE Classic Gen1B, MIFARE Classic DirectWrite aka Gen2 aka CUID, MIFARE Classic DirectWrite, FUID version aka 1-write, MIFARE Classic DirectWrite, UFUID version,

Notes on "Magic Cards," or UID changeable EN:

https://github.com/RfidResearchGroup/proxmark3/blob/master/doc/magic_cards_notes.md

Areas of application: Community security, access control to residences, parking cards, employee attendance cards, etc.