If you are not satisfied meet in any regards, please have no hesitation to contact us ,We will try our best to resove it. Please choose the magnification that suits you according to your needs!! Objective lens: 2X and 4X Binoculars with universal LED light source Working distance: 81mm and 57mm Working distance means the distance between the objective lens and the object when the focus is clear! Please pay attention on this! Please kindly note: The distance between the black objective lens cover and the stage is about 53mm!!! If you need 81mm working distance, please take away the black objective lens cover ! Wide field field eyepiece: WF10X, WF15X, WF20X for choosing Total magnification: 20X and 40X； 30X and 60X； 40X and 80X Hinge binocular head Double pupil spacing 55-75mm can be adjusted, 45 degrees tilt ?60mm black and white board reflection of natural light for lighting Rack and pinion grille mechanism, with limit and hand wheel heavy light adjustment mechanism Net weight: 1.98 kgs ?