Main technical parameter 1. Video enlargement: (14'monitor) 200x 2. Chromatic aberration diminishing object lens:4x 3. Vertical adjustment distance:20mm 4. Horizontal movement distance:20mm in vertical direction,20mmin horizontal direction 5. Cold light source: Double light:220v/125w;winter model and summer model 6. Optical fiber bundle: Diameter 6mm, length 1000mm, light transmittance 70 percentage 7. Weight:22kg(black and white set); 24kg(color set) Widely used in medical service and health products sales etc.