OMAX 40X-2000X Compound Binocular Biological Microscope with Replaceable LED Light Total magnification: 40X-80X-100X-200X-400X-800X-1000X-2000X; Eyepieces: widefield WF10X/18 and WF20X; Objectives: achromatic DIN 4X, 10X, 40X (S), 100X (S, Oil); Viewing head: 45 degrees inclined 360 degrees swiveling binocular; Interpupillary distance: sliding adjustable 2-3/16inch ~ 2-15/16inch (55mm~75mm); Diopter: adjustable on both eyepiece tubes; Nosepiece: revolving quadruple Stage: mechanical stain-resistant double layer size 5-1/2inch x 5-1/2inch (140mm x 140mm), translation range: 3inch x 2inch (75mm x 50mm); Focus: coaxial coarse and fine focus knobs on both sides, rack and pinion adjustment, with tension control; Focusing knob can be locked for observation and transportation Condenser and diaphragm: Abbe NA1.25 rack and pinion adjustment condenser with iris aperture diaphragm; Black palm rest on the base; Illumination: transmitted (lower), replaceable 3W LED light, variable intensity Metal framework; Condenser and diaphragm: NA1.25 Abbe condenser with iris diaphragm; Power supply: 100V~240V 50/60Hz worldwide range (US and Canada power plug) 5-year warranty against manufacturing defects