This Control Company illuminated magnifier provides an in-focus and highly defined view of surface details, illuminating uniformly over the field of observation. High-powered magnification has universal application for precise scientific, plant, and fieldwork. Illuminated magnifiers are supplied with AA replaceable batteries. Replacement battery Cat. No. 1111. Replacement bulb Cat. No. 8707. Maginfication: 2 x with 4 x Spot. Large size. Window Size: 2-3/4 x 2-3/4-Inch. Control Company#: 3350.