Adjustable level of each volume
Subaru Impreza / Subaru Impreza Owners Manual / Audio / Hands-free system (if equipped) / Using the Hands-free system / Adjustable level of each volume

See also:
Tire pressure monitoring system (TPMS) (if equipped)
The tire pressure monitoring system provides the driver with the warning message
indicated by sending a signal from a sensor that is installed in each wheel when
tire pressure is severely low.
...
Front passenger’s SRS frontal airbag
The front passenger’s SRS frontal airbag uses a dual stage inflator. The inflator operates in different ways depending on the severity of impact.
The total load on the seat is monitored by the occupa ...
