... Introduction:It is an electrical and optical high-tech diagnosis system merging computer technology, optics, imaging study, ergonomics principles and colposcopy ... port :digital video output and S-video ,Video ,NTSC,PAL system.7.Focusing distance :150-550mm8.Optical zoom:24 times, digital ... : Professional digital colposcope software. SW-3304 Digital Colposcope Imaging-forming system