The range on Rocky Talkies vary according to the terrain, which can interfere and block signals. On flat terrain where you can see for miles, the radios have a technical range fo 25 miles – but such conditions are rare. In the mountains, a range of 1-5 miles is more realistic but highly dependent on local terrain. If you are trying to radio a group directly on the opposite side of a large mountain, you’ll be unlikely to reach them no matter how close they are. The radios are best used along ridgelines and summits where terrain blocks the signal less.