Specification: Viewing Head Sliding Binocular Head, at 45°360° Rotatable Eyepiece Wide Field Eyepiece WF10X,P16X Objective Achromatic DIN 4X,10X,40X(S),100X(S,Oil) Stage Single Layer Mechanical Stage 140X140mm/75X50mm Condenser Abbe NA1.25 with Iris Diaphram & Filter Illumination Built-in Illumination,Halogen Lamp 110V or 220V/6V20W Plan-concave Mirror