Features:High quality optical system for wider magnification.Each mirror is coated with a layer of special optical components, for clear and bright imaging.Using eyepiece and auxiliary objective lens, the magnification can be extended to 3.5X-180X.Super long effective working distance up to 30-165mm.The observation head can be tilted at 45 degrees and rotated 360 degrees, which will not cause eye fatigue after long time use.Adjustable binocular vision, ensure that different vision can get clear and satisfactory image.Variable double handwheel horizontal (axial) bilateral setting operation is convenient and comfortable, variable double repeat precision is high.Applicable to electronics industry, hardware processing, jewelry archaeology, textile printing, engineering plastics, biological dissection teaching and so on.Specification:Material: Aluminum alloyObjective magnification: 0.7X-4.5XObservation: binocular tilt angle 45Pupil distance adjustment range: 54mm - 76mmAdjustable bilateral visibility: 5 diopterStage into a circular plate: 95mm black white plateWorking distance: 100mmEyepiece interface: dedicated interface 1XCTVAdjustable focus bracket focus handwheel: 50mm (lifting range)Base plate size: 38*25*2cm / 15.0*9.8*0.8inWeight: Approx. 5800g / 204ozPackage list:1 x Binocular Stereo Microscope with Bracket & Base Plate2 x 10X/20 Eyepieces2 x Silicone Eye Mask1 x Dust Cover3 x Dust Cap1 x Hex Screwdriver