... I/O PortsParallel Port1 x External LPT1Serial Port3 x Com Port,( COM2, +5V)USB Port4 x USB2.0LAN2 x 10M/100M ... , Support 1-2-3 track, USB Port IC Card Reader ( Option)Internal, USB/RS232 Port Working EnvironmentWorking Temperature0 oC~40oCWorking Humidity20%~80 ...