Two observation methods, upper and lower light sources, are used to zoom in and observe microorganisms that cannot be seen by the naked eye The 45 ° tilted monocular lens is ergonomic and avoids cervical discomfort caused by prolonged use, The base observation is solid and does not shake 3 lenses meet different needs, and the school laboratory is equipped with 10x/25x eyepieces and 2x magnification lenses to meet different magnification requirements Easy to , focusing handwheel, accurate focusing, and simple .