This 7X 23D pocket magnifier has a round aspheric lens and a strong White light. Like all magnifiers in our new Advantage line, this magnifier is illuminated by LED and uses three triple A batteries in a convenient hinged compartment on the handle. It comes in a sturdy box with a soft leather pouch to carry it in. This is slightly stronger than the 6X magnifier. There is a lifetime warranty on the LED, switch, and the hinged compartment. The proper way to use this magnifier is to hold it to your eye and bring what you are reading up to the magnifier until focus is achieved. The weaker magnifiers achieve focus further from the lens. With stronger magnifiers, focus becomes progressively closer to the lens. Using this magnifier properly, to achieve the widest angle of magnified view, the user might hold the lens just a couple of inches from the reading material. This is usually difficult if not impossible with tri-focals or bi-focals. This magnifier is also available with a Contrast Yellow light.