3.5-90x Stereo Microscope, Variable 144-LED + 3M Camera 3.5X-90X super widefield continuous zoom magnification High quality precise optics offer crystal clear stereo images 2-1/2" (65mm) super wide field of view, 8" (200mm) long working distance and 26:1 large zoom ratio 144-LED four individual lighting zone ring light with dimmer 3MP digital camera with advanced editing &amp; measuring software for Windows XP/Vista/7/8/10