It makes each operation parts rational arranged. Coaxial coarse and fine focussing knobs provide you comfortable feeling and can be rotated flexibly. Both hands can be placed on the plastic armrests of the base in a relaxed, natural posture. The result: less operator fatigue allowing for longer periods of observation. Another attractive feature is this model can be provide multifunction by choosing corresponding accessories such as phase contrast, photomicrography, dark-field, polarizing, TV and video, fluorescence, etc. This model can meet your various needs and will be your ideal tool in your work. It is also an ideal instrument in research and test in many field such as biology, bacteriology, histology, immunology, pharmacology, chemistry, agriculture and stockbreeding. Objective Lens:10x, 25x, 40x & 100x. Eyepieces: 10x & 16x. Power: 220 ~ 240v/50Hz Out:60v/20W