arc length,point-point length,angle varuous measure way, manual&auto two ways focus, led light ... object distance:0mm 5. Measure:arc length,point-point length,angle(unit:um) 6. Videogaphy:High compression 7. Light source:LED ... .0 2.0M pixels, zoom auto&manual focus portable microscope digital endoscope, zoom microscope, measure tool, high video compression