1. Convenient to carry, ideal traveling tool, lightweight size, convenient to carry, charge your mobile phone anywhere, anytime, never need AC power, all you needis just an AA battery 2. High efficiency and power saving, max. currency for max. efficiency transform design, the charger start to work automatically after it be connected with digital devices, till the battery run out of power 3. Fashion and lightweight, unique design, leading fashion. Coated metallic surface, different colors available for option. Green or red light glow from the transparent part of this product, during the charging 4. Safe to use: adopts special integrated circuit as the charging main part to ensure and control the precise of the charging. Overvoltage protection integratedto protect your DC, MP3, MP4 and cell phone from damage. Smart to charge, safe to use Main technical parameters1. Battery type: AA (5#) alkaline battery or Ni-MH battery 2. Input voltage: 1.0V-1.8V3. Output voltage: 5.7V or 5.9V4. Output currency: max. 350mA Size:21*73mm Weight:33 g