AmScope 3.5X-45X Dissecting Boom Zoom Microscope + USB Camera 3.5X-45X continuous zoom magnification power offers sharp clear stereo erect images Super widefield optics, sturdy boom stand, and 54-LED compact ring light with dimmer 2-1/2" (65mm) super widefield view and 8" (200mm) large working distance 0.3MP camera captures still images, records and streams live videos on your computers Advanced editing & measuring software compatible with Windows XP/Vista/7/8, Mac OS 10.6 & up and Linux