Ultimate Outdoor Portable Speaker: With rugged built, FINGERS SolarHunk2 is an absolute beast built to resist indoor wear and tear plus, withstand all the knocks and scuffs from outdoor activities. Power of Solar: SolarHunk2 features high-performance mono-crystalline silicon solar panel to harness this abundantly available source of solar energy and use it to charge the speaker. This means you can enjoy your music without having to look for a power outlet, ever. 