With this battery case, it is easy to power your iPhone4/4S anywhere anytime. Offers you the convenience of a fully protective,  hard-shell case. Thin, light weight, low-profile design

Features:

Totally cover and protect your iphone4/4S from slipping
Thinnest and lightest
Specially designed camera hole for eliminate flash glare
Quick charge. Same as the original power adapter
Soft cover- easy to push the on/off button of your iPhone4/4S

Specifications:

Model: rechargeable external battery case for iPhone4/4S
Capacity: 1900mAh
Output: 5V, 0.7A max
Dimensions: 126x 63 x 16mm
Weight: 65g
Kindly Reminder: please read the user manual carefully before operating this device
Package size: 163 x 101 x 24mm
Package contains:
1 x External Battery Case for iPhone 4/4S
1 x USB  Cable
1 x English User Manual