Specification:
1. There is the "charger" and "discharger" control button on the side, you can choose whether or not you charger the machine.
2. With Two USB port, one is for MP3, another one is for a phone-PDA-iPod
3. Incidental to the four plugs, the UK plug, the US plug, the Eur plug, Aus plug. Supersede optionally! !
4. Green, Red lights Direction. Recharged in the process of green