Greenough zoom optical system. Binocular head; 45º inclined with Built-in digital camera CMOS 1/2 chip. 3MP - 2048x1536 pixels with USB2.0 output. Widefield eyepieces WF10X/20mm. 4:1 Zoom ratio; WD=80mm. Objective magnification range: 1X-4X. FBGG: Pole type stand with large working base and head holder. Coarse focusing system with tension adjustment. 12V/10W incident and transmitted halogen illumination with intensity control. Power supply 100V-240V (CE). Black/White and frosted glass stage plates; blue filter and dust cover. Software Motic Images Plus 3.0 ML for PC and Mac. Calibration slide.