The large, 3" diameter 2X magnified glass lens and battery-powered light help reduce eyestrain. Its built-up handle 1.375" diameteris comfortable to grasp, and the on/off light switch slides easily. A 2" plastic rim surrounds the lens so magnifier can be laid directly on an objects surface to view; as magnifier is raised from the surface, objects appear increasingly larger. Requires two C batteries (not included). Latex free.