... ,RFIDtime attendance can be available Networking with RS-232/RS-485 or TCP/IP. ST-680 LCD networking&standalone time attendance type series ... -size, time attendance can be availableNetworking with RS-232/RS-485 or TCP/IP1,networking and standalone time attendance,compact-size time ... which is able to operate as stand-alone (offline).3,Networking with RS-232/RS-485 or TCP/IP interface.4,Maximum ...