Stereo microscope for home or classroom use enables students and hobbyists to inspect biological specimens, rocks, stamps, jewelry, and large specimens that require handing or manipulation. Binocular viewing head with pair of widefield eyepieces, adjustable interpupillary distance, and inclination to simplify viewing for young users. Objectives provide low magnification and longer focal length for inspecting large-scale specimens. Frosted plate allows light to pass through from below with transparent specimens, and stage clips secure the specimen during viewing Articulated Free Binocular Head Rack and Pinion Coarse Focusing Mechanism With Slip Clutch and Tension Adjustment. Specification: Item Name: binocular stereo microscope Material: metal Wide Field Eyepiece: WF10X Total Magnification: 40X, 20X and 40X, or 20X and 30X and 40X Objective: 4X, or 2X and 4X, or 2X and 3X and 4X Eyepiece Mounting Size: 30.5 mm Interpupillary Distance: 55-75mm (2.17"-2.95"), 45 degree inclined Stage: 60mm black and white reversible stage plate Diopter Adjustment: +/-5dp Microscope Structure: upright Working Distance: 2X-81mm (3.19"), 3X-61mm (2.4"), 4X-57mm (2.24") Illumination: top halogen lamp illuminated Power Supply: 110V (220V is also available, please contact me) Articulated Free Binocular Head Net Weight: about 2400 g Package Included: microscope*1 If you have any questions about the product, please contact me, we will contact you within 24 hours and give you a satisfactory answer.