The binocular compound microscope provides phase contrast microscope system & brightfield microscope system. The biological microscope comes with LED illumination with variable intensity, Abbe NA1.25 condenser with iris diaphragm and a complete set of phase contrast kit. It offers eight levels of brightfield magnification from 40X to 2000X, and six levels of phase contrast magnification frm 100x to 2000x. The phase contrast microscope can improve the images of transparent and colorless objects, which are hard to see or invisible in an ordinary microscope. This phase contrast compound microscope can be used for clinical, biological research and educational applications, especially for observing live cells.