the ipod dock can be connected to the car's cigarette lighter. Is it around $50?what abt its functions?

 

The two functions of iPod car docks are to play the music stored in the device through the car's stereo system and to charge the iPod. The music on the iPod is played through the dock, which typically has an FM transmitter on it. The user can set the transmission of the device to a specific FM frequency and then tune the vehicle's FM radio to that set frequency to hear the iPod.