Honda ADV750 Owner's Manual page 58

Answer Back System
The answer back system is a device to find
the position of your motorcycle. When you
press the answer back button on the Honda
SMART Key with the ignition switch
or (Lock) position, your motorcycle informs
you the position by blinking the turn signal
light, and lighting the ignition switch ring. The
ignition switch ring will light for about 1
minute.
The answer back system uses low-intensity
radio waves. It may affect medical equipment
such as a cardiac pacemaker.
54
(Off)
Ignition
switch ring
Answer back
button