2.5X whole page magnifier with base is a hands free first quality optical quality acrylic Fresnel lens magnifier that has crystal clear optics Do not confuse this full page 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 A crystal clear bright image makes this full page Fresnel sheet magnifier excellent for reading, hobbies and crafts, assembly, inspection and computer screen enlargement. Lens Size: 8"x10".Lens Power: 8 Diopters (2.5X Plus).Sturdy Non-Tilt Base.Lens is adjustable horizontally and vertically.