Samsung's LED backlighting technology provides MEGA Dynamic Contrast for crystal-clear image quality and detail along with a robust number of intelligent, Eco-friendly features. The SA550 is the smart way to conserve energy without compromising the performance of your monitor. The Eco Motion Sensor has the ability to sense the user's presence and will automatically shut off the monitor when you walk away. The Eco Light Sensor feature automatically optimizes the screen's brightness to reduce eye strain, while Eco Saving allows you to choose how much energy you'd like to save through an easy-to-use interface. The amount of energy you save is conveyed by an "Energy Tree" graphic so you can see if you're attaining your energy-saving goals.