1.Sharp stereo erect image over a wide field of view. 2.45 inclined and 360 rotational binocular head with locked-in eyepiece.The left ocular-tube with diopter adjustment +5dp,The interpupillary distance is between 55-75mm 3.Zoom objective 1x-4x 4.ZTX-E series supplied with pillar style stand, ZTX-E-W series supplied with arm curved style stand.ZTX-3E series trinocular head. 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.Three sets in one carton 8.A wide range of optional accessories. Optional accessories: 1.Eyepiece WH5x(+22mm),WF10x(+23mm)WF15x(+13mm),WF20x(+10mm) 2.Auxiliary objective 0.5x,0.75x,1.5x,2x 3.Figure eyepiece:VD-TV,VD-PC 4.Darkfield stage,+95mm 5.White/black working plate,+95mm 6.Fluorescent bulb 5W 7.Halogen bulb 12V/10W/LED 8.Ring fluorescent lighting 8W & 10W 9.Wooden cabinet with lock and key /Aluminium case Each set packed in styorfoam and in an inner box.Three sets in one carton