This compact, lightweight device keeps your iPhone 4/iPhone 3GS/3G/iPod powered up. Plug AC charger into the wall power socket, charge your Short circuit protection and automatic power switching to avoid over charging Charge and sync iPhone 4/iPhone 3GS/3G/iPod while connecting to your computer with provided iPhone cable What’s in the box: 1xUSB AC Charger with US plug (5V/1A); 1x iPhone USB charge & sync cable