This combination hand-held, illuminated magnifier/measuring instrument is perfect for anyone who needs to check small items frequently for size or quality. It's more powerful and versatile than most magnifiers. And more convenient than a microscope. To use the Lenscope™, simply choose your lens and measuring scale, turn on the light, and examine your subject. Two angled light sources, one at 45° or one at 90 from the viewing angle, provide comprehensive illumination. The Model 22-630 comes with a 7X lens, made of optical quality glass to provide a flat, sharp image. A 10X lens and four interchangeable photo-metallic glass measuring scales (same as those used with measuring magnifier Model 22-635) are available separately. The scales allow you to measure fractional inches, centimeters, angles and radii. The Lenscope™ weighs just 5 oz. And fits easily into a pocket. It has a durable, ergonomically designed, off-white plastic body and a protective case. The illumination lamps require (2) AA batteries (not included).