Touch screen monitor itouch plus display surface screen size 15 inches max resolution 1 024 x 768 pixel response time 25 ms aspect ratio 43 contrast ratio typical 7001 brightness 250 cdm dot pitch 0 298 mm viewing angle 160140 pixel density 8533 ppi horizontal frequency range 31 80 khz vertical frequency range 56 75 hz number of dvi inputs 1 number of vga inputs 1 monitor connection usb x2 integrated feature speakers ergonomic proper