PHILIPS 15" 150S4 LCD Monitor (Black) 15-inch Philips 150S4 LCD Monitor General Features: Black color 15-inch TFT LCD 0.297 x 0.297 mm pixel pitch 1024 x 768 pixels @ 75 Hz maximum R.G.B. vertical stripe Anti-glare polarizer; hard coated 16.7 Million colors 56~76 Hz vertical refresh rate 30 ~ 61 kHz horizontal frequency 400:1 contrast ratio 250 cd/m2 brightness 30 ms response time 50 upper viewing angle