7X-45X large zoom range continuous magnification. Head 45 degree inclined 360 degree swiveling binocular. Interpupillary Distance 2-3/16 2-15/16(55-75mm). 7x-45x stereo binocular microscope with 14 pillar stand & 64-led ring light one led-64 compact ring light. This microscope provides all the excellent features of a high quality laboratory instrument at an affordable price.