Bresser optik biolux usb microscope with 4x digital zoom bresser 5201000 p this bresser optik biolux usb microscope with 4x digital zoom has been designed so that several people are able to view your findings simultaneously via the high quality 8 9cm 3 5 lcd monitor p p manufactured with two led lighting units the lighting for this impressive microscope can take place in three ways as you are able to illuminate the object from underneath above or both the transmitted light unit is