... certificate 2.charging and data transfer 3.for iphone4/4S/3G/3GS USB2.0 charging and data transfer cable for iPhone ... charging from a wall outlet.Compatible with:iPhone 4, 4S, 3G,3GS,iPhone oneiPod Touch one, two, threeiPod Classic Nano one ... Actual Strength to solve the Sudden Events. for iPhone4/4s/3G/3GS, for iPod,iPad, data&charging,free samples