Contactless MIFARE DESFire EV3 8K key fob that uses advanced radio frequency identification (RFID) technology to deliver secure and reliable physical access to premises. The key fob is made of impact-resistant matt polycarbonate and ultrasonically welded in a stainless steel frame, making it stable and durable, with IP67 and IK09 rating perfect for carrying on a keyring. One bulk pack comes with 50 key fobs.