I have never gotten more than about 2200 feet horizontal under near perfect conditions (miles from any interference, clean line of sight, 300 - 400 foot altitude). I was right next to a pretty tall mountain and so felt safe to go straight up 500 meters (1600 feet) and was loosing signal with the bird directly above me. I don't know how you guys get 5000 feet plus using the same P3 as me. Makes me think something is wrong with mine.