Push to talk is often confused as being the same thing as a two way radio. While it is true that two way radios use push to talk communication (think walkie-talkies), push to talk or PTT is a feature that can be added on to a cell phone plan for use on your cell phone. Two way radios on the other hand, are simply two way radios, with no additional features https://freess.io/bbs/board.php?bo_table=stoneage