Model: G223E-E20 * Total magnification: 20X, 40X, 80X; Eyepieces: widefield WF10X/20 and WF20X; Rotational objectives: 2X, 4X * Head: 45°Inclined binocular with locked-in eyepieces; Diopter adjustment on left ocular-tube; Interpupillary distance: 2-3/16" ~ 2-15/16"(55-75mm); Working distance: 2-1/4" (57mm); Field of view: 10mm/5mm * LED cold illuminators: incident (upper) and transmitted (lower); Adjustable focus knob tension; Frosted glass stage plate: 3-3/4" (95mm) in diameter; White/black plastic stage plate: 3-3/4" (95mm) in diameter; Head vertical moving range (along the pillar): 2-3/4" (70mm); Focusing adjustment range: 1-5/8" (42mm) * All metal mechanical components; Full optical glass elements; Power adapter: Input: 120V AC 50/60 Hz (US and Canada); Dimension: 8-1/4"x 4-3/4" x 14-1/4" (21cm x 12cm x 36cm); Net weight: 5 lb 0.5 oz (2.28 kg)