4. Operating System and Equipment
Desc
ription of Tunnel Mode Function
When the car enters a tunnel in radio mode, if
the radio signal is weakened so that the listening is
seriously affected, the volume will be reduced to a
limited one; when the radio signal recovers, the
volume will return to normal automatically. When
the car is running at urban canyons or mountainous
areas where the radio signal is poor and unstable,
the mute function will be enabled, leading to
unstable volume.
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