AmScope 3.5X-90X Trinocular Zoom Stereo Microscope w Boom Stand + 80 LED Light 3.5X-90X 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