... 1.66GHz/512KB L2cacheMaterial: Aluminium magnesium alloy chassis3*COM(2*RS232, 1*RS232/422/485), 1*PS/2, 1*VGA,1*LPT ... 800x600 Luminance 220 cd/m2 Contrast Ratio 400:1 Touch screenType Resistive Touch screen Controller Interface Internal USB ( RS-232 interface option) Light Transmission ... , 8.4" Touch screen,IEC-817N2V Board, DDR3 1G Ram, 2.5" 250G SATA HDD, 3*COM(2*RS232,1*RS232/422/485), 1 ...