arc length,point-point length,angle varuous measure way, manual&auto two ways focus, led ... Max object distance:0mm 5. Measure:arc length,point-point length,angle(unit:um) 6. Videogaphy:High compression ... of memory video 9. Focusing:Auto focus + Manual, resolution:1280*960,960*720,640*480,320* ... USB 2.0 2.0M pixels, zoom auto&manual focus portable microscope digital endoscope, zoom microscope, measure ...