I Flew 2.81km north towards a nearby radio tower. The quad flew very well, great tracking, speed and controllability. I felt like this was the limit of the UPair One's range, the 600mw 5.8Ghz FPV transmitter was pretty snowy at times but the control transmitter also was getting to it's limits. At the antenna, RTL mode was auto selected once or twice and I decided that returning to home was a good idea. This distance is about 2 Miles which is pretty darn good in my opinion for a $295 quad.