... Binocular Head, Intepupillary Distance:55-75mm,30ºInclined, 360ºRotatableBuilt-in Digital Camera System, Resolution:1280(H)*1024(V),1/2Chip, USB2 ... Coarse And Fine Focusing Adjustable Mechansim: 20mm, Precision:0.01mmBuilt-in Adjustable Brightness Halogen Lamp 6V/20W (or Incandescent or Fluorescent ...