Subaru BRZ 2017 Owner's Manual page 266

3-2. Using the audio system
■
Using cellular phones
Interference may be heard through the audio system's speakers if a cellular
phone is being used inside or close to the vehicle while the audio system is
operating.
CAUTION
■
To prevent battery discharge
Do not leave the audio system on longer than necessary when the engine is
off.
■
To avoid damaging the audio system
Take care not to spill drinks or other fluids over the audio system.
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