Features: * Compatible with MP3 ,MP4, I-pod USB device * With LED light indicator. * Used high molecule LI Polymer battery that was meet with environmental protection. * Weight , Operation and portable easily. * With LED indicator when it is under stand by mode or Charging mode. Specification: * Measurement (Battery Pack only): 4.5cm(L)*2.5cm(W)*1.5Cm(H) * Weight : Approx. 30g * 1pcs of high molecule LI Polymer battery . 3. 7V (4,2V)V/350mA * Input Voltage :5V, 400mA * Charge condition : Voltage : DC 5V USB standard Circuit : 350-400mA (1 Hour) * Output DC Voltage: 5V USB standard * Output Circuit : 350mA * Power energy : 1.5 W Accessories: Finger size of USB Battery pack USB output cable ( auto Shrinking) Handy Cable line Neutral Blister Packing manual