LED Technology White LED's are solid state devices which light up to full consistent brightness faster saving startup time. LED's are free from mercury content which allows for eco-friendly recycling & disposal process. LED's allow for better dimming control of LCD backlight resulting in super high contrast ratio. It also gives superior colour reproduction thanks to consistent brightness across the screen. Built-in Stereo Speakers Now you can enjoy all your multimedia & social applications with stereo sound. These built in speakers not only sound great but also helps you to get rid of external wire clutter & save valuable desktop space. Smart Contrast Smart Contrast is a Philips technology that analyses the contents you are displaying automatically adjusting colors & controlling backlight intensity to dynamically enhance contrast for the best digital images & videos or when playing games where dark hues are displayed. When Economy mode is selected contrast is adjusted & backlighting fine-tuned for just-right display of everyday office applications & lower power consumption..