... Screen 4. Wifi optional; 5. 6 COM,1*PS/2,1*LPT,4*USB, 2*GLAN,1*PCI All in one touch screen pc ... Ratio 700:1 Touch screen Type Resistive Touch screen Controller Interface Internal USB ( RS-232 interface option) Light Transmission 81% or more Operating Force ... Packing list x1Ordering informationsIEC-617DFAll in one touch screen pc,17" TFT LCD, 17" Touch screen, IEC-817N2V Board, Intel Atom D525 dual-core ...