PowerJolt Plus for iPod & iPhone. Car charger for iPod or iPhone with pass-through socket. It's like giving your car an extra 12 volt socket. Plug PowerJolt Plus into your cigarette lighter or accessory socket and use it to charge your iPod or iPhone. While it's charging pop open PowerJolt Plus' lid and use the pass-through socket inside to power your other stuff. An LED ring lights up to show that PowerJolt is receiving power and is ready to charge. 1 amp output level means fastest possible charging for your iPod or iPhone. Built-in circuit protection keeps power at safe levels.