Power Bank 2500mAh Ultra-Thin Wallet Sized Portable USB External Battery Charger w/Built-in Micro USB Cable for USB-Charged Devices (pic 2) Travel Charger :Elegant and compact design (2.45x3.8x0.3 inches /0.23 lb.), it is very convenience to keep as card in your wallet for long flights, road trips, or whenever you need to charge your iPhone, iPad, or other smart device. Smartphones & Tablets:Good compatibility with all brand mobiles:SAMSUNG, IPHONE, NOKIA, HTC, BLACKBARRY, MP3,MP4 and other digital portable products; Protection Guarantee: This portable charger will automatically shut down if a short circuit or overload output occurred while unit is charging. Package comes with an easy-carrying keychain and 12 months Worry-Free warranty provided by HEXIN Charge Faster, Charge Smarter iSmart technology Automatically detects and delivers the optimal charging current for any connected device - ensuring the fastest, most efficient charge. What You Get: Slim 2500mAh Portable Charger, Micro USB Cable, Manual