m303 slotTo enhance hh security, M303 desn with two build-in SAM slot in ISO7816 standard. Ultra low power consumption is deal for mobile and battery-operated devices. Hhlhts. 13.56MHz HFTo enhance hh security, M303 desn with two build-in SAM slot in ISO7816 standard. Ultra low power consumption is deal for mobile and battery-operated devices. Hhlhts. 13.56MHz HF