What does ' iPod ready ' mean?

== == Many modern car and marine audio systems, etc., are marketed as "iPod ready"- it means that it comes with its own cable and 30-pin plug for an iPod, and is configured so that song selection can be carried out on the head unit (or the head unit's remote control), which usually has a display for albums, tracks, play lists, etc. This way, the iPod can be left in the glove box or console (wherever you choose to route the cable), because the clickwheel and display are not needed.