The monocular biological microscope is designed for students, educators, and hobbyists aiming to explore the microscopic world in detail. Featuring a versatile magnification range from 4X to 100X with oil immersion, this microscope offers sharp, achromatic optics paired with a wide-field eyepiece for comfortable viewing. Its unique 360° rotatable two-person observation head encourages interactive teaching and learning. The sturdy double-layer movable stage allows precise sample control, while the coaxial coarse and fine focusing system ensures accurate, smooth adjustments. Equipped with a down LED lamp and a condenser featuring a variable diaphragm (NA=1.25), this microscope delivers bright, clear illumination suited for school laboratories and home use.