I'm located in the middle of the state, between Raleigh and Greensboro.
The 1825 has a range of up to 1 mile, and has 3 settings of 8 levels. You can program it to be set low, medium, and high depending on what works best for your dog. It also has vibrate.
Here is the operating manual for reference:
https://www.sportdog.com/media/download ... Manual.pdf