The Barska 40x, 100x, and 400x Compound Monocular Microscope delivers impressive detail and clarity with a 10x wide field eyepiece and 4x, 10x, and 40x objective lenses. An adjustable concave mirror allows the microscope to be used without the need for a power source. This Barska Compound Microscope features fine and coarse focus adjustments, slide retention clips, and a rotating nosepiece with three objective lenses. The 40x, 100x, and 400x Compound Monocular Microscope is ideal for hobbyists, industrial use, and medical applications.