AmScope New LED Trinocular Stereo Zoom Microscope 3.5x-90x 3.5x-90x large zoom magnification power on table pillar stand 2-1/2" (65mm) SUPER widefield view and 8" (200mm) working distance Rectangular top light with 30 high-intensity LED white-color bulbs 3-3/4" (95mm) LED reflecting-plate bottom illumination Variable illumination intensity with separate dimmer controls