The Celestron Labs S20 Stereo Microscope is the perfect introductory stereo microscope offered at an economical price. With its 20x power, it is well suited for viewing details on 3D objects such as leaves, insects and many other objects. The upper LED illuminator provides detailed viewing, and with the removable stage plate, there is an option for bottom lighting (user supplied). You\'ll enjoy exciting discoveries right out of the box with the two included insect specimens. The S20 Stereo Microscope is light and easy to carry in the field making it well suited for hobbyists and students. Features - Great introductory stereo microscope with 20x power - 10x eyepieces with 2x objective lenses - Metal head with coarse focusing knob - Upper LED illumination for detailed viewing - Two insect specimens included - Two AA batteries included Specifications Eyepieces: (2) WF 10x-all glass Objectives: (2) 2x Magnification: 20x Focuser: Coarse focus Head: Upright binocular Interpupillary distance: 2.25\" to 3.0\" (57.15mm x 76.2mm) Working distance: 2.76 in (70 mm) Illumination: Top only-LED Battery Power : 2AA-included Stage: Simple stage with metal clips Accessories: (2) Bug Specimens encased in plastic Dimensions: 4 in x 5.3 in x 9.75 in (102 mm x 135 mm x 248 mm) Weight: 1lb-2 oz. (.49 kg)