The Pro Lite E2280HS is a 21.5′′ Full HD 1920 x 1080p LED-backlit monitor. It features 5ms black-to-black response time & >5 000 000: 1 Advanced Contrast Ratio assuring very good picture quality. Triple Input support of Analogue, DVI & HDMI ensures compatibility with the latest installed graphics cards & embedded Notebook outputs. The monitor is 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. HDMI HDMI stands for High-Definition Multimedia Interface. Much smaller & more convenient than DVI, HDMI also has the significant advantage over DVI that it supports audio as well as video signals. Full HD With true 1920 x 1080p resolution your monitor is ready to display high definition images. This means you can accommodate more information on your screen; e.g. 60% more in comparison to a 1280 x 1024 monitor. 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.