Here is a multifunctional solar-charging 4-port USB hub. Not only a USB hub, the device has built-in rechargeable 130mAh battery for serving as an emergency power backup solution for your portable devices such as cellphone, MP3 players, PMPs..etc. The built-in battery can be charged by sun or USB power.
The multifunctional hub has four USB 2.0 ports and two LED lights with on/off switch. It comes with seven power tips, including mini USB and micro USB, for charging different devices.