1. New Ultra-thin (6.6mm) fashionable design and easy to carry, ultra-thin frame, one of the thinnest power bank in the world! you can put it in your wallet like a credit card! 2. Built in Micro-USB cable and LED light, special connector for iPhone 3. Built in 4000mAh high quality Li-polymer Rechargeable battery cell to extend the life time 4. Great for emergencies, traveling, outages, and many other situations, easy to use, quick to charge. 5. As backup portable supply power for Iphone, Ipod, Mobile phone, digital camera and other digital devices. 6. True all-in-one design - the built-in cable is both MicroUSB and Apple® Lightning compatible, meaning no more fuss with separate cables.