These composite cards from HID iCLASS Seos utilize contactless technology with 13.56MHz read/write capabilities and 16k bytes of storage. The Seos technology employed offers top-of-the-line cryptography and unparalleled data and privacy protection, providing a more secure environment compared to other credential technologies. During card sessions, no traceable identifier is exchanged, preventing any associated data from being divulged or cloned.Meets ISO standards for card thickness16k bytes memory sizeMade of composite PVC/PET material