Technical Performance: 1.Sharp stereo erect image over a vide field view. 2.45? inclined and 360? rtational binocular head with locked-in eyepiece.The left ocular-tube with diopter adjustment ± 5dp,The interpupillary distance is between 55-75mm 3.Three kinds of 90? rotational objective selection:1x/2x,1x/3x,2x/4x. 4.ZTX-10/ZTX-20 series supplied with pillar style stand, ZTX-10-W ZTX-20-W series supplied with arm curved style stand. 5.Electric apparatus has CE approval 6.Power supply 110V/60Hz or 220V/50Hz 7.Each set packed in styorfoam and in an inner box.Four sets in one carton 8.A wide range of optional accessories. Optional accessories: 1.Eyepiece WF5x,WF10x,WF15x,WF20x 2.Auxiliary objective 0.5x,0.75x,1.5x,2x 3.Video Attachment for Microscope 4.Darkfield stage,Ф94.5mm 5.Jewel tweezer 6.White/black workingplate,Ф94.5mm 7.Frosted glass working plate,Ф94.5mm 8.Fluorescent bulb 5W 9.Halogen bulb 12V/10W 10.Ring fluorescent lighting 8W & 10W 11.Wooden cabinet with lock and key