chip type: EM4305 (125KHz) | writable | code not printed on the card | Wiegand 26-bit | standard ISO/IEC 7810 ID-1 size, thick
chip type: EM4100 (125KHz) | readable/writable | code not printed on the card | Wiegand 26-bit | ISO/IEC 7810 ID-1 size, thin