arc length,point-point length,angle varuous measure way, manual&auto two ways focus, led light source support, portable model ... long & 3.6GB of memory video 9. Focusing:Auto focus + Manual, resolution:1280*960,960*720,640*480,320*240, display ... 11. interface: USB 2.0 2.0M pixels, zoom auto&manual focus portable microscope digital endoscope, zoom microscope, measure tool, high video compression