20x/40x cheap binocular stereo microscope

 SpecificationsObjective 1XObjective 2XObjective 3XObjective 4XWorking Distance 100mmMag.FOVMag.FOVMag.FOVMag.FOV10X/20mm10X20.0mm20X10.0mm30X7.5mm40X5.0mm15X/15mm15X15.0mm30X7.5mm45X5.0mm60X3.3mm20X/10mm20X10.0mm40X5.0mm60X3.3mm80X2.5mmMagnificationStandard 20X/40X，can choose different Objective to 10X..80X Eyepiece Standard:10X/20mm，Wild Field, High Eye-pointOptional Eyepiece 10X/20mm，15X/15mm，20X/10mmHeadsInterpupillary: 54-76MM. Inclined 45 °. Rotatable 360°Hinged BinocularObjectiveCombination 2X/4X、1X/2X、1X/3XFocusingA1 Focusing Knob,Range 50mmBaseB1 Small Standard Base, Can Choose Other BaseIlluminationOptional Various Fluorescent and LED Ring Lights…