... from 7" to 82", such as 7", 8", 10.4", 12.1", 15", 17", 19", 20", 21.5", 22", 24 ... SAW, Capacitive, with USB or RS232 touchscreen interface.3. One aluminum bezel on the front, VESA mount, open frame ... 3W AMP CircuitUSB portsDefaultx4 USB(Max x6)Touch TypeTouchScreen TypeResistive(4-wire)Optional Touch TypeSAW, IR, CapacitiveTouchScreen interfaceSerial (RS232 ... (%RH) touchscreen Panel PC 7" all in one