Dodge Charger 392 SRT Hellcat 2017 Owner's Manual page 164

162 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
If an obstacle is detected in the center rear region, the
display will show a single solid arc in the center rear region
and will produce a one-half second tone. As the vehicle
moves closer to the obstacle, the display will show the
single arc moving closer to the vehicle and the sound tone
will change from slow, to fast, to continuous.
If an obstacle is detected in the left and/or right rear
region, the display will show a single flashing arc in the left
and/or right rear region and will produce a fast sound
tone. As the vehicle moves closer to the obstacle, the
display will show the single arc moving closer to the
vehicle and the sound tone will change from fast to
Single 1/2 Second Tone/Solid Arc
continuous.