Connect your Apple iPad/iPod/iPhone to car audio or amplified speaker with aux input The dock connector sends line level audio out from your iPod/iPhone, providing better sound quality then the headphone jack output 2-in-1 cable with USB plug for connect to the computer Gold plated 3.5mm jack connector Brand New and High Quality Quick connectivity to your personal computer via any USB port Charge your iPhone or transfer data via any USB port Connect your Apple device to your car stereo, home Hi-Fi, DAB radio or amplifier using the 3.5mm jack Compatible with Apple iPod all models, iPad, iPhone 1G/3G/3GS/4G
Universal,iPod,The New iPad,iPad 2,iPad,iPhone 3G/3GS,iPhone 4/4S,
It does exactly what it's supposed to: identical to the original one.
I find it useful in two cases: when you drive for long distances, to connect your iphone/ipod/ipad to the car stereo system, while charging it; when you play the guitar in garageband, to connect the ipad to an amplifier and still be able to charge it.
I definitely suggest you buy it.