The MiLi Power Crystal comes with a retractable USB cord and six connector tips for various digital devices. Compatible with your iPhone 3G, 3GS, 4, 4S and iPod. It provides power exactly when you need it. Perfect for people on the go. It comes with a retractable USB cable along with six connectors to easily accommodate your own digital design. It works with products from Apple, Nokia, Samsung, Blackberry and LG.