... USB2.0 interface 2,charging fucntion 3,400 mAh backup battery 4,LED light 5,Ultra thin design,portable Item #:MP ... -028Item Name:3 in 1 Ultra Thin Card Battery Features 1,Data sync with USB2.0 interface,high speed ... ,which can supplement 15% power capacity for iPhone. 3,Allows you to charge your iPod, iPhone, iPad when connecting to your PC ...