Revolutionary power generating technology will keep you charged up! Developed by AmpWare. CrankCase is the world's first power generating case for smartphones. CrankBox is a universal power generator for ANY device. Just unfold the crank handle and spin. The handle is connected to a rare earth magnet dynamo generator. This dynamo generator produces serious power to charge your phone in fact its 23 times more powerful than solar and it works at night! The generator is connected to your phone via a USB charging cable. You can use this short cable to sync to a laptop. Cranking the CrankCase gives you backup talk/text time when you have no access to wall power.