Clamps-On to desk, table or workbench.The Clarity clamp-on page magnifier is a first quality fresnel lens magnifier, that has crystal clear optics A crystal clear bright image makes this full page magnifier excellent for reading hobbies and crafts, assembly, inspection, and computer screen enlargement. Do not confuse the Clarity Full Page Sheet Magnifier with inexpensive magnifying sheets. The lens of the fresnel magnifier is first quality acrylic, that lets you view a bright clear and sharper image Lens Size: 10"x12".Lens Power: 8 Diopters (2X Plus).Sturdy Clamp.Lens is adjustable horizontally and verticallyMaximum clamp opening-2 inches.For best results use with adequate lighting.CLICK IMAGE FOR LIGHT INFORMATION Bright LED Light clips-on to the table and provides a bright light to the object being viewed