Zoom Stereo Microscope Eyepiece Type Trinocular Microscope Type Stereo Stand Type Pole Light Source LED Optical Field of View 22 mm Max Specimen Height 180 mm Optical Magnification 7X to 45X Maximum Magnification Capability 180X Vertical Extension 7 in Base Dimensions 8 in x 10 1/2 in Manufacturers Warranty Length Lifetime Optics and Mechanical 1 yr Electronics Working Distance 101.6 mm Eyepiece Protractor No