If you are not satisfied meet in any regards, please have no hesitation to contact us ,We will try our best to resove it. Eyepiece: WF10X, WF20X Objective lense: 2X Use WF10X eyepiece: total magnification 20X = (eyepiece 10X) x (objective 2X) Use WF20X eyepiece: total magnification 40X = (eyepiece 20X) x (objective 2X) Eye View Angle: Binocular, Upper View Adjustment range of pupil distance: 57-76mm/2.24-2.99'' Working distance: 70mm/2.75'' Focusing System: Rough Focusing Wheel Lighting source: LED lamp Power supply: 2*AA battery (excluded) Size: 248*135*102mm/9.76*5.31*4.01'' Weight: 492g Color: Grey, White Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks Compatible with your understanding. 1 X Microscope 2 X Eyepiece [relateproductdetail/]