Greenough zoom optical system. Binocular or trinocular head (according to model) 45º inclined and 360º rotating. Widefield WF10X/20 mm eyepieces. Zoom ratio 6:1 and magnification range 0,75X-4,5X. 100 mm working distance. R2LED: base stand with pole and head holder and incident and transmitted illumination. Incident LED 3W illumination with intensity control. Dust cover included. Supply 220-240 V (CE). 5 years warranty on optical and mechanical components. Delivery time 2-3 weeks