OMAX 20X-40X-80X Cordless Dual LED Lights Stereo Binocular Microscope with USB Digital Camera Total magnification: 20X, 40X, 80X; Eyepieces: widefield WF10X/20 and WF20X; 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); Adjustable focus knob tension; 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 XP/Vista/7/8/10, and Mac OS - Capturing microscope images, recording live video, measuring lengths, angles, areas, editing images 5-year warranty against manufacturing defects