With features like smartimage front stereo audio usb port and ergo base the energyefficient 190bl1 business display enhances your productivity bullaspect ratio 1610 bulloptimum resolution 1440 x 900 60 hz bullresponse time typical 5 ms bullbrightness 250 cdmsup2 bullcontrast ratio typical 10001 bullsmartcontrast 20 000 0001 bullpixel pitch 0283 x 0283 mm bullsignal input dvi d digital hdcp vga analogue bullusb usb 20 x 1 bullbuilt in audio