The iFrogz BoostPlus Audio Speaker is compatible with any smartphone or digital music player with external speakers. It amplifies the audio from the speakers in your smartphone or digital music player without cables or syncing. Its 3.5mm jack makes it compatible with virtually every device, even ones without external speakers. It fits anywhere for convenient portability. The iFrogz BoostPlus Audio Speaker have play time up to 15 hours when powered by three AA batteries, but you can be powered by a Micro USB cord.