AmScope 3.5X-180X Trinocular Articulating Arm Pillar Clamp 144-LED Zoom Stereo Microscope 3.5X-180X zoom magnification power with crisp stereo images 2-1/2" (65mm) super widefield of view and 8" (200mm) large working distance Flexible articulating arm with a pillar and a clamp The trinocular port uses the third port for camera capabilities, giving you the remaining two ports to view your specimen Powerful 144-LED ring light with built-in dimmer