1.Plug and Play, design for iphone4,good look 2.Battery + Case Combo function, 3.The perfect solution signal problem Function Features:1.Micro usb port.data sync.2.4 LED lights indicationg charging condition.3.Unique holder design,easy to enjoy video.Basic Parameters:Charge for iphone:5v/500mABuilt-in LIP:1600mA/sAccessories:Micro USB to USB cable Hot Sale Fashionable Charging Case with Battery ...