The AmScope B400-LED is a professional-grade biological binocular compound microscope engineered for high-precision research and clinical analysis. As a leading model in the AmScope B400 series, this instrument is a preferred choice for veterinarians, medical clinics, and advanced science classrooms due to its superior optical clarity and robust mechanical construction. The microscope features a binocular head with a 45-degree incline and 360-degree rotation, providing an ergonomic viewing experience for seated or standing users. It is equipped with four high-quality achromatic DIN objective lenses—4X, 10X, 40X, and 100X—providing magnification levels from 40X to 1000X for the detailed study of cells, bacteria, and tissue specimens. The integrated 3D two-layer mechanical stage offers precise X-Y translation with low-position coaxial controls, ensuring smooth specimen manipulation without manual slide handling. For optimal specimen contrast, the system includes an Abbe condenser with a 1.25 numerical aperture and an iris diaphragm. The substage LED illumination system provides cool, daylight-balanced light that is energy-efficient and prevents heat damage to live biological samples. Built with a solid metal frame and finite-conjugate optical system, the AmScope B400 series combines professional functionality with an intuitive design suitable for users at any skill level.