Kern Optics OZP 556 Stereo Zoom Microscope Binocular LED - NEW Open Box. Sauter Kern Optics OZP 556 Stereo Zoom Microscope - Binocular - LED. Lighting type: Transmitted light, Incident light. Supply voltage: 110 - 240 V. Dimensions (L x W x H): 418 x 305 x 283 mm.