18.5 HP S1931a DVI Blu-ray 720p Widescreen LCD Monitor w/Speakers & HDCP Support (Black) 18.5-inch HP S1931a Widescreen LCD Monitor General Features: Black color 18.5-inch Diagonal Widescreen TFT Active Matrix LCD display Anti-glare and anti-static coating 1366 x 768 native resolution 16:9 apsect ratio 84.7 mm pixel pitch 5 ms response time 250 cd/m2 brightness 15,000:1 Dynamic contrast ratio 1000:1 typical contrast ratio 170 /160 wide viewing angles