Mimibox Portable Emergency Charger for iPhone 4S/4G/3G/3GS/iPod - White Mini body, makes it easy to carry around. Save space in your package With Micro USB interface and apple interface Input: DC 3.0V (2 x AA LR6 Alkaline batteries, not included) Output: DC Max.5V/500mA Compatible with: iphone 4S/4G/3G/3GS, iPod Touch, iPod Nano, iPod Classic, except Shuffle