1900mAh Blue External Rechargeable Backup Battery Charger Case Cover Guard For iPhone 4 4S 4G Iphone 4/4S 4G external battery charging case Full Body Coverage for iPhone 4/4S capacity:1900 mAh Package Content:1 x 1900mAh External Backup Battery Charger For Iphone 4/4S 4G Accessory only. Phone not included