Description:Color: PurpleExcellent for long trips and as an emergency backup when your iPhone 4\/4S's battery drains on the goProtective back case for iPhone 4 4SHigh capacity 1900mAh rechargeable batteryWith Micro USB charging portOutput: DC 5V\/700mA (max)Fashionable appearance designUSB cable & English manual includedCable length: 80cmDimensions: 4.92 in x 2.48 in x 0.67 in (12.5 cm x 6.3 cm x 1.7 cm)Package included:1x Rechargeable External Backup Battery Case with USB Cable