... lead time -orignal NXP mifare S50 chip -Frequency:13.56Mhz smart S50 cardWe are one of the leading professional plastic cards ... is very competitive based on a reasonable quality level.Original smart S50 card chip, not compatible chip.Working frequency: 13. ... much cheaper, function is the same.Application: widely used in all industries, such as store, telecom, network,hotel, bank, traffic, ...