Key Feature 1:  3.5X-90X zoom magnification power with crisp sharp images.  Super widefield high-eyepoint optics.  Widefield of view.  4' (100mm) working distance.  Sturdy all-metal pillar stand.  Powerful 144-LED ring light with dimmer.  This stereo microscope has a 144-LED ring light that offers super widefield optics and 3.5X-90X 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 2:  An excellent stereo inspection microscope with intensity-adjustable 144-LED ring light.  3.5x-90x super wide zoom magnification power.  Bright cool light 144-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.     Feature:  1. High quality material, high definition and clear image, improving your work efficiency.  2. The20MP high definition microscope camera is specially designed for industrial microscope.  3. Equipped with standard HDMI output and standard USB interface , convenient to use.     Notice:  1. PC Support : Window 7/8/10 system.  2. For USB output, the white balance, exposure and color adjustment are automatic, they can't be adjusted. For HDMI output, the functions can only be adjusted while connecting with monitor, if you connect the camera with computer, the functions also can not be adjusted.  3. When use USB connection, please make sure no TF card in the camera ,TF card storage is only for HDMI output. USB output will be storage in PC.