I was looking at what transmitter I was wanting to get and the receivers that you can get.

What caught my eye was that on the same receiver. Let's say the R127DF FM receiver for the Futaba 6XAS it has a low and high. What is the differences between the 2? Does one reach further then the other? I just can't see the difference and at tower hobbies it doesn't explain the differences between the low and high.

Thanks!