1.Strong Plastic NFC Keyfobs 2.With free metal Key ring 3.NXP NTAG203 chips 4 ... and fashion shape2.Flexible usage, like for room key,ID cards, access control3.Keyfob measures 4cm by ... quality!RFID key chain tag is also named as RFID key chain,key fob,key finder,key ring,key holder, smart ... IC featureNXP Mifare Ultralight C NFC forum type 2RFID key chain Tag Feature- ROHS certificated.- Housing: ABS, ...