in conjunction with one another for example one of the mobile devices 136 streams compressed music data to the job site radio 104 and acts as a remote control for the volume and playback of audio from the job site radio 104 in one configuration the multiple mobile devices can also interact with the job site radio based on a priority structure for example a mobile device 136 that belongs to a worker at the job site is registered with the job site radio 104 to stream music and act as a remote control for the radio another one of the job site radios that belongs to a supervisor at the job site is registered with the job site radio 104 with additional permission to act as an input source for the loudspeaker functionality in the job site radio if the job site radio 104 receives conflicting commands from the two mobile devices then the controller 124 performs the command from the mobile device 136 of the supervisor that is assigned a higher priority level as used herein the term u201c conflicting command u201d refers to any command is any command that changes the operation of the job site radio to halt a previously selected.