I talk to the people at Leica yesterday about the new 2700B and they told me to go on line and it will tell how to set the 2700B up. For the money it’s very impressiveThe Leica 1600B is what I have had for about six years now and it has been very good. When my wife got into hunting we bought her the newer 2000B which will range further than my 1600B and is a little quicker. They changed the size of the reticle on the 2700B and the one I tried recently was very impressive. The optics on all of them are very good as we would expect from Leica. After trying the 2700B I am sort of hoping that my 1600B dies a natural death sometime soon but I can't see that happening.