Inovat 30P Dock to USB AUX 3.5mm Audio Cable for Apple iPhone 4S 3GS iPod Touch 2-in-1 USB 3.5mm Audio Cable 4FT(White) Charge IPhone in car and play muic out to car Stereo at the same time Connect iPad, iPhone, or iPod to 1/8" (3.5mm) audio device like car audio/hi-fi/amplified speaker or any device with aux input and USB for charging USB Line Out Dock Cable lets you get high-quality line out audio from the dock connector of your iPad, iPhone, or iPod while charging Compatible with Device with 30pin plug like iPhone 2/3/3GS/4/4s, iPod Connector A: USB A Male & 3.5mm headphone jack Male