... case for iphone with case,charger,speaker function external stereo speaker,enjoy music when charging Intelligent switch 1,product series: 3in1 power case ... for iphone 4/4S,battery case for iphone ,speaker for iphone,3d case for iphone2,Features: (1)3in1 power case ... show the product Battery power state. 3,Specification: if charge to power case,just by iphone usb ...