Product Specifications: RFID tags Size: Square: 18*18mm / 25*25mm 30*30mm 45*25mm or customized ; Round: diameter 30mmor customized Material: PVC, Paper, PET, ABS ; Data storage time : 10 years at least; Antennas : PET Aluminium, or Copper antenna; Working Frequency : 13.56MHz; Reading Distance : 2-10cm; RF protocol : ISO 14443A; Function : Read/Write protect by password; UID code : UID code laser printing,encode the tags is OK; Application