The FRS two way radio is extremely compact and slim for business use; featured with 16 channels and rich features; license free; you don't need a license for RT22 walkie talkie 0-9 level voice activated transmit function allows real hands free operation; adjusting the level according to the environment allows you to get the best audio quality Emergency alarm helps you be prepared for any danger and alert team member; channel lock avoids accidental button changes;working out of the box with each others