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.
One end has a 8-pin connector that attaches to the bottom of your iPad, iPhone, or iPod, the end other splits into a 1/8" (3.5mm) stereo audio plug and a standard USB connector.
Plug the audio into a home, portable, or car stereo to listen to high quality, line-out audio. Plug the USB into a computer or wall charger to charge the iPad, iPhone, or iPod while listening for hours.

Specifications                                                                                                                                                      Brand New and High Quality. Quick connectivity to computers with USB port. Quick charge your iPhone or transfer your data with USB port. With 3.5mm jack directly connecting it to the 3.5mm input socket on your car stereo, home Hi-Fi, DAB radio or amplifier. 2 in 1 cable with USB plug for connect to the computer. Gold plated 3.5mm jack connector . Car charger input: 12-24VDC, Output:5.0VDC 1.0A.