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It is suitable for school, college and educational field use, it is simple, steady in lower level price, but with excellent optical image output.
--Monocular and Dual Viewing Head Available.
--Precise finished optical system and clear image
--Steady focusing system with safty stopper
--Large smooth operating mechanical stage
--Built-in Light Source 110V or 220V
More details: https://www.optoedu.com/biological-microscope_4889665066975241.html