This is a professional grade binocular compound LED microscope 40X-2000X with Kohler illumination. It features reversed nosepiece, 3W LED bright variable illumination (brighter than 30W halogen light) and everything an advanced microscope have. It's easy to replace the LED lamp by your own. The Kohler illuminator provides extremely even illuminaiton across the entire field of view. You can add advanced accessories including darkfield condenser and phase contrast kit to upgrade your microscope. All lenses are made of high quality optical glass. The high resolution image in the field of view is crystal clear and will satisfy the demands of professionals. This binocular compound microscopy is ideal for professionals and also affordable for students.