AmScope SM-3BZ Professional Binocular Stereo Zoom Microscope, WH10x Eyepieces, 3.5X-90X Magnification, 0.7X-4.5X Zoom Objective, Ambient Lighting, Single-Arm Boom Stand, Includes 0.5x and 2.0x Barlow Lens Professional stereo microscope with boom stand has long working distance to enable users to perform work or manipulate large items, including circuit boards and dental appliances Binocular viewing head with pair of 10x super-widefield eyepieces, adjustable interpupillary distance, fixed 45-degree vertical inclination to reduce eye and neck strain, and 360-degree rotation capability to enable sharing 0.7x-4.5x zoom objective provides continuous zoom magnification and longer focal length for inspecting large-scale specimens, a 05.x Barlow lens extends the working distance, and a 2.0x Barlow lens extends the magnification range Ambient lighting illuminates the specimen, eliminating the need for power or batteries Single boom arm with 8" vertical working distance and adjustable 16" boom arm enables users to adjust the microscope on the X- and Y-axes