13.56Mhz Mi fare Keyfob High Frequency MF Keytag Proximity Card S50 Classic 1K Smart Tag NFC RFID Keychain for Access Control ISO14443A Note: 1. Can be Read Wroten 2. Sector 0 Block 0 refers to the Chip UID and Chip info. Only this can not be written, while other sectors and blocks can be written. As for how to write to your card and what password to use, it depends on what password is set on the machine you use the card on, and has nothing to do with the MF card. 3. IMPORTANT NOTICE: The MF keyfob we sell is for authorization purpose, NOT FOR DUPLICATING your exited MF keyfob. For different purpose, the chip is varied. Feature *Contactless transmission of data and supply energy no battery needed *Operating distance: Up to 100mm depending on antenna geometry *Operating frequency: 13.56MHz *Data transfer: 106 kbit/s *Data integrity: 16 Bit CRC, parity, bit coding, bit counting *Anticollision *Typical tickting transaction: 100 ms including backup management Key features Dimensions: 35 x 5mm Multiple Color Options: Black, Blue, Yellow, Red, Green Material: ABS Operating temperature: -20 to +60C Stockage temperature: -20 to +65C Typical applications * Public transportation * Access control * Time Attendance * Event ticketing * Gaming identity