I changed mine out with a RE700 and really like it. I haven't tested how much distance it goes but have gone to where the RE500 would have started to fail and return back again with it regain contact with video. Haven't tested yet to see how much distance I would get for a difference, however, the RE700 has battery indication on the screen where the RE500 does not show battery strength. I never knew how much battery was used during flights and now I know and battery draw if very, very low it appears now that I have signal meter on my iPad.