Objective：Grouped From Any Two Objectives of 1X，2X，3X and 4X， 
Working Distance：90mm； 
Wide Field Plane-Scope Eyepiece：WF10X，WF20X（Optional） 
Total Magnification：10X-20X, or 10X-30X, or 10X-40X, or 20X-30X, or 20X-40X, or 30X-40X, or 20X-60X, or 20X-80X, or 40X-60X, or 40X-80X, or 60X-80X
Articulated Free Binocular Head，Interpupillary Distance：55-75mm； 
45º Inclined，360º Rotatable 
Natural Light For Illuminating Gathered By Ø90mm Black-white Reversible Stage Plate 
Rack and Pinion Coarse Focusing Mechanism With Slip Clutch and Tension Adjustment 
Net Weight/Set：3kg； 
Package：2 Sets/Carton48X30X38cm； 
Gross Weight/Carton：9kg