1.Coaxial coarse/fine focusing system, with up stop 2.12V/20W halogen lamp with brightness control 3.CE certificate This microscope is the conveniently operated optical instruments with excellent functions and new patternit is very suitable for usage in medical test,teaching and microobservation in hospitals and schools. --A, C, with coaxial coarse/fine focusing system, with up stop.--B, D, with ...