This trinocular compound microscope provides USB digital imaging system and phase contrast/brightfield microscope system. The compound microscope features an optical system for simultaneously observing images through eyepieces and an adjustable trinocular port. It comes with LED illumination with variable intensity, Abbe NA1.25 condenser with iris diaphragm, 10MP digital camera and a complete set of phase contrast kit. The 3584x2748 pixel USB digital imaging system that captures still microscope images and live video on computer. The included software compatible with windows, Mac OS and Linux operating system can also be used to make measurements. It offers six levels of brightfield magnification from 40X to 2500X. The phase contrast kit includes a phase contrast condenser, a centering telescopic eyepiece, four phase contrast objectives: PH10X, PH20X, PH40X (S), PH100X (S, Oil). It also offers magnification power: 100X-200X-250X-400X-500X-1000X-2500X. This phase contrast compound microscopy is widely used clinical, biological research and schools, specially for observing live cells.