... Achromatic Objective:4X,10X,40X(S),100X 2.USE USB 3.With LED Stereo Microscope with LED(40X-1000X)1. 45mm DIN Achromatic Objective:4X ... ,Resoultion:1280(H)*1024(V),1/2'',chip; USB2.0,with Micro-image Process Software;Nosepiece:Backward Quadreple Nosepiece.10. Built ... Brightness Halogen Lamp 6V/20w(or Incandescent, or fluorescent,or LED)