Paired Sliding Objectives 1X，or 2X，or 3X，or 4X for Selecting，Working Distance:1X-55mm，2X-81mm，3X-61mm，4X-57mm
Wide Field Plane-Scope Eyepiece:WF10X，WF15X（Optional）
Total Magnification:10X，or 20X，or 30X，or 40X（15X，or 30X，or 45X，or 60X）
Straight Articulated Free Binocular Head，Interpupillary Distance:55-75mm；
Illumination:Top Light-12V/10W Halogen Lamp and Ø60mm Black-white Reversible Stage Plate
Rack and Pinion Coarse Focusing Mechanism With Slip Clutch and Tension Adjustment
Net Weight/Set:1.8kg；Package:4 Sets/Carton61X35X36cm；Gross Weight/Carton:9kg