The SR10 has a time-out delay to return to the audio channel (say back to the 20S headset I have) as standard, or the PTT can be tapped to manually return it. I'd like to see the time-out adjustable in a 5, 10, 15, 20 and 30 second increment in stead of 3 minutes, so no turn-by-turn GPS instructions are missed while using the intercom of the 20S headsets. There has to be a way to do this. Thank You for your consideration again.