arc length,point-point length,angle varuous measure way, manual&auto two ways focus, led light source support, ... 3. Photograph:Taken by the software & by USB wire 4. Max object distance:0mm 5. Measure:arc length,point-point length,angle ... .0 built-in memory, 200X auto&manual, focus portable zoom microscope, digital endoscope, measure tool, high compression ...