Subaru 2009 Impreza Navigation System - Manual (Page 178)

178 Handsfree
Before using the Handsfree
Name of each part
The name of each part used by the functions of the handsfree
is as shown below.
■ In-vehicle equipment
Operating the touch switches displayed on the screen allows you to use
the functions of the handsfree.
■ Steering switches
Pressing the switch short allows you to answer an incoming phone call.
Pressing the switch long allows you to hang up the phone.
■
Microphone
Used while in the phone call. (dealer option)
For details, check with the dealer.