The AS-90 is part of the new Lume 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. Light diffusers work to eliminate LED hot spots, blending and evenly distributing the light. COB LEDs are brighter than traditional LEDs, provide a greater uniformity of lights and consume less power. The AS-90 also features a multi position switch with 2 brightness settings and uses 2 AAA batteries (batteries not included). Ideal for reading fine print or in low light environments, hobbies & crafts, or everyday needs.