Model Number : UID InlayCertification : CE,FCC13.56MHz UID Writable Sector 0 Block 0 This Inlay 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.Specification:Chip: UID ; UID card block 0 (UID's block) can be modified arbitrarilyCapacity: 1k bytesProtocol: ISO14443AWorking frequency: 13.56 MHZReading and writing distance: 1 to 5 cmReading and writing time: 1 to 2 msWorking temperature: -20 to 55 degree, humidity of 90%Erase times : > 100000 timesData storage: > 10 yearsReading time: 100000 timesDiameter: 25mmPackaging materials: PE self-adhesive + coated paper