Effects(TM) Audio 3.5mm AUX (Auxiliary) and Sync Cable Dock USB Charge/sync Connector for iPhone/iPad 2 3-Black Iphone 30 pin adapter to USB (for charging) and 3.5mm audio out One end has a 30-pin connector that attaches to the bottom of your iPad, iPhone, or iPod Plug the audio into a home, portable, or car stereo to listen to high quality, line-out audio Listening for hours while Plug the USB into a computer or wall charger to charge the iPad, iPhone, or iPod Convenient extra long cable to reach stereo and USB port