... etc.2. Optional touchscreen: 4-wire/5-wire Resistive,Infrared,SAW, Capacitive, with USB or RS232 touchscreen interface ... products cover industrial lcd monitor, open frame lcd monitor, touch monitor, commercial monitor, CCTV monitor, Panel PC, video ... Type(optional)TouchScreen TypeResistive(5-wire)Optional TouchScreen TypeResistive touch(4-wire), SAW, IR ,CapacitiveTouchScreen interfaceSerial (RS232) ...