... It is an electrical and optical high-tech diagnosis system merging computer technology, optics, imaging study, ergonomics principles and ... digital video output and S-video ,Video ,NTSC,PAL system.7.Focusing distance :150-550mm8.Optical zoom:24 times ... 150.000 hours ,light intensity can be continuously adjustable).Computer:Brand computerSoftware: Professional digital colposcope software. SW-3304 ...