OPTO-EDU A22.1201-C1 professional stereo microscope has interchangeable pairs of 10x and 20x wide field eyepieces, a 1x objective, LED lighting, and a boom-arm stand. The binocular viewing head has an interpapillary range of 50 to 77mm and a 30-degree inclination to reduce eye and neck strain. The interchangeable pairs of WF10x18mm and WF20x10mm eyepieces combine with the 1x objective to provide 10x and 20x magnification, and a longer working distance for inspecting large-scale specimens that require handling or repair. Dioptric adjustment accommodates individual eye-strength differences. A stereo microscope, sometimes called an inspection or dissection microscope, has low magnification and a long working distance that enables users to manipulate the object being inspected. The 1W LED light is mounted on a flexible gooseneck to enable users to direct the light as needed. An LED light source provides bright, cool light for working with temperature-sensitive specimens. The microscope has a 13.5" pillar that provides a 9" vertical working distance. Bilateral focus eases use for left- and right-handed users. The 17" boom arm has a 12" working distance. The microscope head can be rotated on the X- and Y-axes. All metal construction is durable and stain-resistant.