The phase contrast digital compound LED microscope provides two systems (phase contrast microscope system and brightfield microscope system) for observing live cells depending on your applications. It comes with a built-in 3.0MP USB digital imaging system, a 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. 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-400X-800X-1000X-2000X. The USB digital imaging system captures still microscope images and live video on computer without the hassle of setting up the digital camera. The included software compatible with Windows XP/Vista/7/8/10 can also be used to make measurements. You can also view and capture the images on iMac or Macbook with Mac OS. It's easy to replace the LED lamp by your own. This phase contrast compound microscopy is widely used clinical, biological research and schools, specially for viewing live cells.