3 in 1 USB Sync Cable US Travel & Car Charger for iPhone 4 Comes with a car charger, US plug wall power adapter and a USB data cable Designed for iPhone 4 4G, iPhone 3G USB Car Charger:Plugged into car cigarette lighter jack to become a powered USB port USB Sync &.Charge 2 in 1 Cable:USB 2.0 Hot sync data transfer and charging cable USB Travel Charger:Allows charging at home, work or when traveling,enchanced charge management to prevent over or under charging your ipod and protects against voltage backflow