One of the great things about the iPhone is that itscome with a handy little microphone with an integrated button. The button of course allows you to answer and end calls, as well as play and pause your music. You've also been able to double-click them to skip to the next song, but in3.0 you can actually triple-click to rewind and go back to the previous track! It's a little tough to do at first, but it's a handy little addition that's sure to help out with your daily iPhone use. Enjoy!