The AS-90 Lumé Series™ 2.5x Power 3.5" Acrylic Lens COB LED Lighted Magnifier is part of the new Lumé Series and is a 2.5x Aspheric COB LED Magnifier with 7x Spot Lens. Aspheric lens magnifiers allow for increased magnification and image clarity while greatly reducing edge to edge distortion. It has a 3.5" diameter Acrylic Lens and boasts 3 Ultra bright COB LEDs with diffusive cover lenses. The AS-90 also features a multi position switch with 2 brightness settings and uses 2 AAA batteries (batteries not included).