** The LED-backlit Pro Lite E2773HDS 27" LCD Display features a stunning 1 ms Response Time & a High Definition 1920 x 1080 Resolution. The 5 000, 000:1 Advanced Contrast Ratio & 300 cd/m-square brightness offer the user clear & vivid images, & the HDMI, DVI & D-Sub connections ensure compatibility across a range of devices including games consoles & work stations. The display is Windows 7 Compatible & Energy Star 5.0 qualified.** 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. 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. 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. 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. Over Drive ON / OFF: When very fast graphics are displayed your monitor can sometimes get blurry. Turning on the Over Drive feature will eliminate that. VESA: VESA mount compliance means you can easily mount your monitor to a wall.