AmScope SM-3BZ-80S Binocular Stereo Microscope, WF10x Eyepieces, 3.5X-90X Magnification, 0.7X-4.5X Objective Power, 0.5X and 2.0X Barlow Lenses, 80-Bulb Ring-Style LED Light Source, Single-Arm Boom Stand, 110V 3.5X-90X continuous zoom power with great flatness & contrast Super widefield optics offer crystal clear stereo images 2-1/2" super widefield view and 8" large working distance Sturdy single-arm boom stand covers large working area Powerful 80-LED compact ring light with built-in dimmer