3ft Long MFI, Certified Cable. MFi (Made for iPhone, iPad, and iPod) certification ensures complete charge and sync compatibility with your Apple device. Connect the Adapter to your device and connect the USB side into a wall adapter or USB hub to charge or your computer to sync data. The narrow Adapter is small enough to fit most cases but strong enough to withstand repeated unplugging and storage. High-quality copper wire maximizes signal quality and increases durability.