Microscope Stereo 20x & 40x Dual Magnification with upper and lower light Sources
10x Wide Field Eyepiece
Objectives   2X and  4X   Total 40X magnification
Transmitted or Incident light selected by two position switch on base.
Power by a low voltage 5 volt 200mA power  pack. (supplied)
Provision in base to install 3 x AA batteries (supplied) so the microscope can be used without power source / or in the field.