Depending on what permissions you have set. In my case its only being used by me and my buddy if either of us are out of range or don't have a reliable signal. The repeater we're on is about 15 miles away in a rough spot putting out 40 watts, its not the highest spot in the area. I'm within range most of the time, but for those rare times him or I am not, we still have a way to communicate with the users on it. The Zello Channel is passworded as well as Zelect+ were only Admins, Mods, or Trusted Users can talk and listen. So its pretty secure as far as that goes.