The Pro Lite E2280WSD is a 22′′ 1680x 1050 LED-backlit monitor. It features 5msec black-to-black response time & 5 000 000: 1 Advanced Contrast Ratio assuring very good picture quality. Analogue & DVI inputs ensure compatibility with the latest systems & associated graphics cards. The monitor is TCO & Energy Star Certified. A reliable solution for both home & office use. LED-Backlit A typical CCFL LCD uses four backlight lamps. Using LED diodes considerably lowers the power consumption & reduces the CO2 emission into the environment making this LCD a true ECO-Friendly product. ACR Contrast Ratio is a measurement of the difference between the darkest black & the brightest white your monitor can display. Advanced Contrast Ratio is a feature that automatically adjusts contrast & brightness of the screen to assure perfect picture quality while watching films & playing games. SPEAKERS This LED monitor is equipped with two high quality stereo speakers. VESA VESA mount compliance means you can easily mount your monitor to a wall.