AT24C Series Cards is a kind of contact IC memory card without encryption process. AT24C Series Card includs various kind of chips such as AT24C01, AT24C02,AT24C64 etc. This AT24C** device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential.
Specifications of Chip, please refer to ATMEL site.

AT24C01 provides 1024 bits EEPROM, organized as 128 words of 8 bits each.
AT24C02 provides 2Kbit, 2-Wire Bus Serial EEPROM
AT24C64 provides 64K bit memory.
Size of CR80 standard: 86 x 54mm
Thickness of no less than 0.84mm
Material Option: PVC or PET
Customization Process: Offset printing, Silkscreen printing, thermal transfer printing number or photo ,etc.
Many industrial and commercial applications where low power and low voltage operation are essential.