Description EEPROM storage: 1K Byte Operating frequency: 13.56 MHz Bluetooth and WiFi connections Smartphone with NFC This 13.56MHz RFID Card can be read by almost any 13.56MHz RFID/NFC reader or NFC-enabled mobile devices. View more Links PDF File Specifications Operating frequency:13.56 MHz Default protocol: ISO14443A 4 Byte unique identifier Variable identification distance: 0 - 5+cm