The advanced compound trinocular microscope 40X to 2500X provides a LED illumination system and a 3MP USB digital imaging system. The digital biological microscope features an optical system for simultaneously observing images through eyepieces and an adjustable trinocular port. The 2048x1536 pixels 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. The LED lamp can be replaced by yourself. 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 trinocular microscopy is good for teaching, demonstration, clinical examination and research purpose.