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When you talk directly, all the people will hear. Sometimes you want to talk to only one person privately, in that case this utility will be of great help.
Let’s take the scenario, usually most of cellphones have Class B bluetooth. It means it can work up to 10 meters (without any obstruction). Practically the range is somewhat 20 feet.
Let’s assume that person X want to talk privately to person Y and there is a person Z that is sitting in the center of person X and person Y. The distance between person X and person Y is 20 feet.
X —10 feet distance— Z —10 feet distance— Y
Let’s assume that person X and person Y have walkie-talkie. How low person X and person Y has to talk in walkie-talkie so that person Z sitting at the distance of 10 feet can’t hear them? Moreover, it will be clear to person Z that person X and person Y are talking to each other.
Hence proofed; Failure of concept to privately talk on bluetooth.
Get a walkie-talkie that has range 1000+ feet or more