Dual frequency RFID card or call hybrid rfid card can make sure we use one card and work in at last 2 different frequency reader ,it can save much cost and work in more applications we need . normally we can use low frequency (12.5khz) + 13,56mhz high frequency chip , high frequency +860-960mhz UHF chip .so you only can take one card then can go shopping , take bus , door control access ,medical treatment and so on , Zhixin dual frequency rfid card always makes good performance and best price for you.