Certification : NONEFrequency : 13.56mhzPower : Passive CardChip Type : Composite CardRecognition Mode : Read-writeContours : ISO CardDescription:Chip: 4442Storage capacity: 256byteData protection: 10 yearsSpecification: 85.5*54*0.86mmVoltage: 5VWrite and erasure time: 2.5msDistance of reading and writing: toch ableTimes of erasure: >10 million timespackage:5pcs