Total magnification: 20X, 40X; Eyepieces: widefield WF10X/20; Rotational objectives: 2X, 4X; Head: 45degrees Inclined binocular with locked-in eyepieces; Diopter adjustment on left ocular-tube; Interpupillary distance: 2-3/16inch - 2-15/16inch(55mm - 75mm); Working distance: 2-1/4inch (57mm); Field of view: 10mm/5mm * LED cold illuminators: incident (upper) and transmitted (lower); Frosted glass stage plate: 3-3/4inch (95mm) in diameter; White/black plastic stage plate: 3-3/4inch (95mm) in diameter; Head vertical moving range (along the pillar): 2-3/4inch (70mm); Focusing adjustment range: 1-5/8inch (42mm) * All metal mechanical components; Full optical glass elements; Power supply: Power adapter: - Input: 120V AC 50/60 Hz (US and Canada); Battery: 3 AA batteries * Digital camera: - true color 640 x 480 pixels - 0.45X reduction lens to get larger field of view - Software compatible with Windows 2000/XP/Vista/Windows 7 32/64-bit/WIndows8, and Mac OS - Capturing microscope images, recording live video, measuring lengths, angles, areas, editing images * 5-year warranty against manufacturing defects