Touch screen monitor lcdtft monitor accutouch technology screen size 15 inches max resolution 1 024 x 768 pixel response time 12 ms aspect ratio 43 contrast ratio typical 5001 brightness 250 cdm dot pitch 0 298 mm viewing angle 140125 pixel density 8533 ppi horizontal frequency range 31 5 60 2 khz vertical frequency range 56 75 hz number of vga inputs 1 monitor connections usb rs232c convenience features wall mountable display surfac