The Composite AV Cable allowed the connection of iPod, iPhone, or iPad to a television or stereo system. It allowed movies and videos to be viewed along with stereo sound from a device with a 30-pin connector. This cable did not allow the display to be mirrored.
According to Apple.com, “The Composite AV Cable connects to your device or Universal Dock via the 30-pin dock connector and to your TV, home cinema receiver or stereo receiver via the composite video and red/white analogue audio ports. The cable also features a USB connector that you can plug in to a power source.”
This cable is unopened in a white box. It was later repackaged in a black box.
Reference: Apple.com, Wikipedia.org