Please contact us if you have any questions about this item.Installing the iPhone 4/4S offGRID Backup Battery Case is as easy as plug and play. Simply slide the iPhone 4/4S into the hard shell case - the built-in dock connector remains connected to your iPhone 4/4S and ready to power your device with the push of a button. Charge or sync your iPhone 4/4S through the inlcuded micro-usb cable. The built-in interior Apple dock connector acts as an adapter for the micro-usb plug, allowing you to charge or sync with any usb-A port. Four blue LED indicator lights keep you informed of your backup battery life. Tap the power/status button to view the current charge or touch and hold it for two seconds to turn on the battery and unleash up to 1450mAh of charging capacity. An open cutout for the iPhone 4/4S's camera allows for full functionality while maintaining low-profile protection. An oval cutout prevents any flash interference from the case. Full access to all ports and buttons means you'll never have to worry about removing your offGRID Case to plug in an aux cable or toggle your mute switch. An engraved Incipio logo adorns the lower-right hand corner of the case as a testament to Incipio's legendary customer satisfaction guarantee. Rest assured you have the highest quality materials guarding and charging your iPhone 4/4S.