I opted for the Bresser Researcher Binoc with battery operation, since I as a water guide to the city and the district Heilbronn flexible even spot a Binoc to investigate, primarily need Makrozoobentos. With Petri dishes equipped, this Binoc is ideally suited for the investigation and determination of caddis fly larvae, flatworms, amphipods, leeches, beetles, snails, etc.! The various types of lighting and dimming of illumination are of great advantage. The endurance of the batteries I have not gained any experience. But the ease of use and the presented images I'm thrilled. At the price exactly what our One needs !!
