I bought these to keep in touch with a friend while he helps me get around the country. Thought it would be a lot easier than messing around with phones. I live about 3 miles away so we checked them out and we both came out clean! Driving home it disappeared here and there with too many houses etc blocking the signal but I was definitely impressed! There's a lot of weird stuff about you. Things that take some time to understand or remember. (I easily lose instructions)