100% Brand New and High Quality! Operating Frequency: 13.56 MHz Protocol: 14443 A Rewritable multiple times and can be locked if required Antenna Size: 60mm x 40mm 137 characters available in NDEF format Card: 85.5mm x 54mm x 0.84mm with rounded corners 1152 bits / 144 bytes of user memory with a unique 7-byte serial Color: White Material: PVC Package Contents: 120 x NFC Cards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. real thing. The measurement allowed error is +/- 1-3 cm.