arc length,point-point length,angle varuous measure way, manual&auto two ways focus, led light source support, ... software & by USB wire 4. Max object distance:0mm 5. Measure:arc length,point-point length,angle(unit:um) 6. Videogaphy ... .0 2.0M pixels, zoom auto&manual focus portable microscope digital endoscope, zoom microscope, measure tool, high video compression