It fits over your monitor with a self-adjusting foam gasket that seals out ambient light. Since it does not hang from the monitor but fits over it, it feels much more like an integrated monitor element. This efficiency is provided by six layers of optical coating on each side with a vacuum deposition technology. Screens meet American Optometric Association specifications for VDT glare reduction. Dust and dirt build up are minimized by the cover seal and by a special antistatic ground wire that goes from the cover to the nearest available ground.
Technical specifications are available if desired.
Monitor measurement is the width along the top of the monitor cover.