View type : binocular stereo microscope (trinocular) Focusing : with rack and pinion system Zoom ratio: 1x to 5x (or 0.6x to 4x) Stage : condenser bright field with iris diaphragm on rack & pinion Illumination : built in 6v-20w halogen lamp Packing : packed in thermo coal box Accessories: vinyl cover, duster, cleaning brush.