This is a dual lights binocular stereo microscope offers 20x, 40x and 80x magnifications. The dual illuminator system includes the upper incident light and the bottom transmitted light. The bottom transmitted light allows variable intensity illumination. The stereo microscope is made of high quality metal and premium quality optical glasses. You will be very impressed with the sharp stereo erect images over a wide field view. The 90 degree rotational objectives also give the flexibility to lots of people. This microscope is an ideal instrument for jewelry dealers, gemologists, collectors.