125KHz or (ISO14443) Many kinds of chips Inside water and dust proof and anti shock ... 13.56Mhz (ISO14443, ISO15693), Requires no battery Many kinds of chips such as: SMC4001/EM4100/4102/TK4100/TK9013/Temic5557/mifare ... printing, ID number or serial number printing Main used for: access control, attendance control, identification, logistic, industrial automation, skating, tickets, casino token, ...