Microscope, Eyepiece Type Trinocular, Microscope Type Stereo, Stand Type Single Arm Boom, Light Source LED, Optical Field of View 22 mm, Optical Magnification 0.67X to 4.5X, Maximum Magnification Capability 10X, Vertical Extension 14 3/8 in, Horizontal Extension 20 3/8 in, Base Dimensions 10 in x 10 in, Manufacturers Warranty Length 5 yr, Working Distance 100 mm, Eyepiece Protractor Yes