1.Exreactable & Compact design can make the using easily and simply
2. Built-in Li-ion rechargeable battery,also can be taken out for other small applications usings.
3.USB charging cable is available , allow you get power from computer or other ways when the solar difficult to get.
4.4pcs mobile phone adaptors are available to allow you run different kinds of mobile phones.
5.Built-in reverse current protection circuit integrated to prevent batteries from being discharged.