Advance LED Binocular Microscope Eyepiece WF10x & WF16x Achromatic objective PL4x, 10x, 40x, 100x Quadruple nosepiece Build-in double layers mechanical stage 160 x 142mm N.A. 1.25 condenser with iris diaphragm Illuminator LED (Cold Light) Working Distance 2-195mm Adjustment Distance 0.5mm Focusing Coaxial coarse (22mm) & fine adjustment (0.001mm)