This is a 40x-1600x research biological microscope with 30 degree inclined 360 degree swiveling siedentopf binocular head. It is a perfect choice for labs, clinics, universities, and high schools. The coaxial coarse and fine focus adjustment is very smooth and percise. The two pairs of 10x and 16x eyepieces will provide you with high resolution images over a wide field of view. This microscope is also equiped with a large stain-resistant double layer mechanical stage. If you would like to see live images on your computer screens, this microscope is also compatible with many kinds of usb digital cameras (sold separately).