... 5 1*PS/2,1*VGA,1*LPT,4*USB,2*GLAN,1*Audio,Wifi HMI, Human machine interface, IEC-608NF is a industrial touch screen ... LCD Resolution 800x600 Luminance 220 cd/m2 Contrast Ratio 400:1 Touch screenType Resistive Touch screen Controller Interface Internal USB ( RS-232 interface option) Light ... HDD, 3*COM(2*RS232,1*RS232/422/485), 1*PS/2, 1*VGA, 1*LPT, 4*USB, 2*GLAN, 1*Audio 8" HMI with touch screen