Compound Binocular Microscope Professional Biological for Lab with Plan Achromat 40X‑5000X Magnification 100‑240VAC EU Plug Item Type: Compound Binocular Microscope Model: KP AM200 Optical Magnification: 40X-2500X Observation Tube: Binocular hinge, tilt 30 degrees, rotate 360 degrees, Pupil Distance Adjustment: Approx. 48 ~ 75mm / 1.89 ~ 2.95in Eyepieces: Wide angle eyepieces WF10X DIN18mm, WF25X 8mm Objective: Flat field achromatic objective 4X, 10X, 40X, 100X (oil lens) Converter: Four hole conversion Platform: Double layer mechanical mobile platform, Area: Approx. 125 x 115mm / 4.92 x 4.53in, Moving Range: Approx. 76 x 52mm / 2.99 x 2.05in Focusing Mechanism: Low hand position coarse and micro coaxial focusing mechanism, Coarse Adjustment Stroke: Approx. 20mm / 0.79in, Fine Tuning Accuracy: 0.002mm Condenser: For Abbe condenser, NA = 1.25, variable aperture Light Source: LED cold light source 1W Power: External regulated power adapter, 100V-240V AC50/60Hz Battery Type: 3 x AA battery(not include)