With this multi-functional charger, there is never an excuse for your iPod to run out of power. You can charge your iPod in your vehicle via the 12V DC charger (cigarette lighter), with your computer via the USB cable, with any standard 9V battery via the allotted port and with your conventional power outlet in your home via the AC adaptor. So whether you are on the road, in your office, at home or on your computer, you can enjoy the sounds of your iPod without ever experiencing interrupted play caused by a dead battery. This charger allows you to sync and transmit MP3 files from your computer to your iPod with the USB cord as well. With this multi-functional charger, the epitome of convenience is always at your disposal.