AmScope SE402X Professional Binocular Stereo Microscope, WF5x and WF10x Eyepieces, 5X/10X/20X Magnification, 1X and 2X Objectives, Tungsten Lighting, Boom-Arm Stand, 110V-120V Professional stereo microscope with boom arm has long working distance to enables users to perform work or manipulate large items, including circuit boards and dental appliances Binocular viewing head with interchangeable pairs of 5x and 10x widefield eyepieces, adjustable interpupillary distance, and fixed 45-degree vertical inclination to reduce eye and neck strain 1x and 2x objectives provide low magnification and longer focal length for inspecting large-scale specimens Side-mounted tungsten light adjusts simultaneously when the head is moved 6" vertical working distance and adjustable 12" boom arm enables users to adjust the microscope on the X- and Y-axes 5X-10X-20X Widefield stereo magnification powers 6" very large working distance 1X & 2X Two objectives Versatile boom-arm stand Incident side light