... series: 3in1 power case for iphone 4/4S,battery case for iphone ,speaker for iphone,3d case for iphone2,Features: (1)3in1 power case for iphone 4/4S: with protecter case,emergency charger and speaker function. (2)External stereo speaker,enjoy ... : °C ~ 50 °C (9)Storage temperature: 65 °C ~ 20 °C Hot sale Power case for iphone with speaker function battery case for iphone