1. Directly charging the mobile telephone under sunlight . 2. Built in lithium battery (500mAH), it can be charged both by sunlight and AC current, it can store the energy under sunlight if no mobile phone is being charged, 3. Solar charger can work as a battery for use at emergency if no sunlight is available, it can support your mobile phone 20-40min. of talking time depending on models of your mobile phone. 4. Small size, light weight, suitable for almost all kinds of mobile phones by simply changing the different connectors, the color of charger is customer selectable. 5. Four major brand mobile phone adaptors such as Nokia, Sony-ericsson, Samsung, and Motorola are provided for one set charger.If it cannot match your mobile phone, please buy at local agent or advise us .