The Magnabrite light gathering magnifier is a superbly crafted, solid acrylic 4x magnifier with a unique characteristic: it actually intensifies the light that passes through it, making the magnified subject clearer and nearly four times brighter. No bulbs or batteries required, just innovative optical engineering. It also has an infinite eye-point, which means your eye can be any distance from the magnifier, at nearly any angle, without affecting focus or clarity. Best of all, several people can view it at the same time! Size: 2 inch Diameter.