Primary function of navigation is to locate the vehicle through GPS signals. This component uses satellite navigation to get the data of the location.It also calculates the route to a particular destination. The use of Gyroscope, drivetrain and accelerometer helps it to be more accurate in urban areas or in tunnels where GPS signal loss is probable.
Audio Equipments are installed in automobiles in order to provide in-car entertainment and also for other purposes such as communication and/or to give relevant information to the vehicle occupants. Until the 1950s it only consisted of AM Radio but today it can operate via smart phones, Flash Drives, CDs, DVDs and also radio can be operated.