... . Operating system: Linux 4. Communications: RS232 ,RS485,TCP/IP( Standard ) USB-DEVICE 5. Identification time:≤2S,FAR≤0.0001%, FRR≤1 ... Function :Workcode, Webserver, function key, schedular bell, short message10. Optional: backup supply, Printer, WIFI .11. USB Flash Disk: 128M(Support USB 1.1 Protocol). ELP ...