... power case for iphone 4/4S,battery case for iphone ,speaker for iphone,3d case for iphone2,Features: (1)3in1 power ... iphone 4/4S: with protecter case,emergency charger and speaker function. (2)External stereo speaker,enjoy music during charging (3)intelligent switch between ... sign can switch for sound between iphone 4/4S and speaker. lightning sign : still press the key 3 seconds,the light ...