Description Pack of 5 Mifare RFID key fob tags Resonance frequency: 13.56 MHz Memory: 1K Byte EEPROM Identification distance: 0 to 1.97" View more Dimensions 1.38 x 1.1" Thickness: 0.24" Specifications Type: Type - A - MIFARE Operating temperature: 14 to 167 °F Service time: 100.000 rewrites