AmScope 40X-2500X Home School Monocular Compound Microscope with 100X Oil Immersion Objective and Dust Cover 40X-2500X Precise Glass Optical Magnification Settings Separate Coarse &amp; Fine Focusing Sturdy All Metal Framework Abbe Condenser w/ Iris Diaphragm and Color Filter Holder Built-in Tungsten Light with GS and CE Approval