The onscreen bar is essential for those who suffer from sore eyes from working with the monitor late at night, and I'm serious meant.1. My setup looks great! 2. Helps my eyes in dark environment! Good build quality and can be powered from my monitor's USB port. The interfaces are simple enough to quickly navigate between turning on and off, adjusting the brightness, and setting warm and cool lights. It works flawlessly and superbly, even compared to a hundred dollar brand. The mounting system also works well and is stable enough to work with a monitor arm. Do you recommend buying one of these? You suffer from eye pain, then a HUGE YES. Are you looking for a way to improve your table decoration? (Try clicking on one while the discount is still high.)