Cosmos ® Black Cable 3 Ft USB Charge and Sync Data Cable + Dock Connector Extender Extension Cable for Ipod Touch Iphone 4 4s 3 3Gs + Cosmos Cable Tie
I wanted to use this to extend the iPod cable that is built into my car (a 2009 Infiniti G37).  This cable did not charge my iPhone 4, nor did it pass through the audio signal.  Overall the cable seemed well built, but it didn't do what I needed it to do.