If you are not satisfied meet in any regards, please have no hesitation to contact us ,We will try our best to resove it. widefield of view 4" (100mm) working distance Sturdy all-metal pillar stand Powerful 60-LED ring light with dimmer This stereo microscope has a 60-LED ring light that offers super widefield optics and 7X-45X zoom magnification power with a cool light illumination system. It is an ideal instrument for industrial inspection and/or biological lab applications. This microscope is perfect for gemologists, manufacturing engineers, dental lab technicians, and anyone in electronic and semiconductor industries. Key Feature: An excellent stereo inspection microscope with intensity-adjustable 60-LED ring light 7x-45x super wide zoom magnification power Bright cool light 60-LED illumination system High resolution with great flatness and contrast, giving sharp and clear images Binocular head with 45 degree inclined 360 degree swiveling eye tubes Sharp stereo erect images with a wide field of view Crystal clear original true color microscope images Dual eye tubes with adjustable diopters Large working distance Sturdy all-metal table stand Accurate alignment reduces eye strain for longer periods of viewing Full optical glass elements Precise ground glass lenses Full metal chrome-plated mechanical components Adjustable interpupillary distance Rubber eye-guards included Specification: Head: 360 degree rotatable 45 degree inclined binocular Eyepieces: 30mm super widefield high-eyepoint WF10X/20MM Objective Zoom Range: 0.67X-4.5X, using the Barlow lenses Working Distance: 4" (100mm) Diopter Adjustment: +/- 5dp Interpupillary Distance: 2-3/16" - 2-15/16"(55-75mm) Round Plate: 3-3/4" (95mm) in diameter Stand: 10" x 7-7/8" x 10.75" (254 x 200 x 275mm) Illumination: 60-LED Ring Light Power Input: 110