20X/40X easy cheap binocular stereo microscope

ST-40 Series Stereo Microscope has two magnification levels(10x/20x, 10x/30x, or 20x/40x). It is designed for both indoor and outdoor applications, powered by either batteries or wall-power. It is an ideal microscope for student learning and classroom teaching. It is also a perfect device for viewing jewel, PCB, insects and so on. ObjectiveEyepieceW.D.(mm)WF5XWF10XWF15XWF20XMag.F.O.VMag.F.OV.Mag.F.OV.Mag.F.OV.1X5X18.0mm10X20.0mm15X13.0mm20X10.0mm562X10X9.0mm20X10.0mm30X6.5mm40X5.0mm813X15X6.0mm30X6.7mm45X4.3mm60X3.3mm614X20X4.5mm40X5.0mm60X3.25mm80X2.5mm586X30X3.0mm60X3.35mm90X2.2mm120X1.67mm66Magnification  10x/20x, 10x/30x, 20x/40x with different two-magnification levelsEyepiece  WF10X/20mm;high-eyepoint;wide-field;Convenient;forobservers wearing glassesOptional Eyepiece  WF5X, WF10X, WF15X, WF20XMain Body …