This is a simple, 6ft. 3.5mm audio cable. Commonly used with audio, this cable can also be used for really easy data transmission, as well as analog voltages. The connectors are common, the cables are common, this is a great way to get basic devices connected. Handy for use with the OLPC.
This is absolutely the cable you need to connect your iPod or media player to a car's auxilary jack.