This 3X 8D pocket magnifier has a rectangular aspheric lens with a strong white light. Like all magnifiers in our SMARTmag line of lighted magnifiers, this one 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 leather pouch to carry it in. This is the least strong magnifier in this line and will be slightly stronger than what is found in most drug stores. 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. This is how you'll see the widest angle of magnified view. The weaker magnifiers achieve focus further from the lens. With stronger magnifiers, focus becomes progressively closer to the lens. This magnifier is also available with a Contrast Yellow light.