... WF16X for choice) Dual Viewing Head,One Tube 30º Inclined And Another Tube Vertical ,360º RotatableNosepiece :QuadrupleDouble layer ... Output 6VSELON SE-XSP-200V Microscope, Focusing Coaxial Coarse and Fine AdjustmentBiological Microscope, microscope digital, Microscope Features:1,Big Operating Space ... % balance before delivery. SELON SE-XSP-200V Microscope, Focusing Coaxial Coarse and Fine Adjustment