I live on 4 acres that is completely wooded with tall pine trees. I took the Mavic up through an opening in the trees this afternoon and flew about 900-1000' away, 125' high, and completely lost signal several times. I know trees degrade radio signals but I didn't think it would be this bad. I was standing next to our garage which is a metal building and it seemed to get better when I moved further from it, but it still surprised me to lose signal that close to home.