AmScope 7X-45X Stereo Zoom Boom Microscope + Fiber Ring Light 7X-45X continuous zoom magnification with crystal clear erect images Trinocular port for adding photographic or video capability 1-1/4" (33mm) SUPER widefield of view and 4" (100mm) working distance 150W powerful cool light halogen illuminator with fiber optic ring light Coming with electricity auto-shut-off design and color filter slot