The super Solar Mini Speaker system is yet another interesting addition to an entire array of multifunctional portable devices. Incorporating S-2-O (Solar to Output) technology, the speaker draws its energy from the sun. It charges several devices including your cell phone and saves whatever energy it has been left with in to its built-in internal lithium ion battery. The awesome mini speaker charger also plays FM radio and also has a USB port and SD card slot on top and plays mp3 files with surprisingly powerful and stunningly clear tones. The speaker system also has a clock with temperature data display and can be had a great price.