A 1-second tone will sound to
confirm that 0 has been selected.
A beep sounds
when you press the P-T-T switch.
A short beep will sound to confirm that 1 has been
selected.
The LED will show
green and blink twice.
A 1-second tone will sound for the 0, there will be
a short pause, and then a short beep will sound for
the 1 to confirm that 01 has been selected.