My husband drove off to another neighborhood with the Enron Eco Treks and we don't think they had a two mile range, if that matters to anyone. They seemed very good for about 3/4 mile which will usually be enough for us, so I'm OK with them since they were cheap. I am not sure if that's because he was in his fast moving car on the highway, or that the range is just shorter than advertised, but just thought I'd let folks know how we did with them.